\u4ec0\u4e48\u53eb\u201c\u85cd\u7259\u201d<\/title> \n<\/head><\/p>\n<body><\/p>\n<table width=\"92%\" align=\"center\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td height=\"37\">\n<div align=\"center\">\n<h1><a href=\"http:\/\/tutor.howang.hk\/\">\u88dc\u7fd2<\/strong><\/a>-\u4ec0\u4e48\u53eb\u201c\u85cd\u7259\u201d<\/h1>\n<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#f7f7f7\" height=\"20\">\n<div align=\"center\">http:\/\/tutor.howang.hk\/-<a href=\"http:\/\/tutor.howang.hk\/\">\u9999\u6e2f\u88dc\u7fd2\u57ce<\/strong><\/a><\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td align=\"center\" height=\"1\">\n<hr width=\"95%\" noshade=\"noshade\" size=\"1\" \/><\/td>\n<\/tr>\n<tr>\n<td>\n<div align=\"right\"><\/div>\n <a href=\"http:\/\/tutor.howang.hk\/\">\u88dc\u7fd2\u4ecb\u7d39<\/a><\/b>\u4ec0\u4e48\u53eb\u201c\u85cd\u7259\u201d\u85cd\u7259\u662f\u4e00\u500b\u983b\u7387\u70ba2.45GHz\u7684\u901a\u7528\u7121\u7dda\u96fb\u901a\u4fe1\u63a5\u53e3\uff0c\u5b83\u901a\u904e\u4e00\u500b\u7279\u6b8a\u7684\u7db2\u7d61\u53ef\u4ee5\u5728\u5404\u7a2e\u4fbf\u651c\u8a2d\u5099\u4e4b\u9593\u5efa\u7acb\u8d77\u7121\u7dda\u9023\u63a5\u5e76\u9032\u884c\u77ed\u7a0b\u901a\u4fe1\u3002\u5728\u4e00\u500b\u5fae\u5fae\u7db2\u4e2d\uff0c\u6bcf\u500b\u55ae\u5143\u90fd\u80fd\u540c\u6642\u8207\u5176\u5b83\u5404\u55ae\u5143\u9032\u884c\u901a\u4fe1\u3002\u800c\u4e14\uff0c\u6bcf\u4e00\u500b\u55ae\u5143\u53ef\u4ee5\u540c\u6642\u5c6c\u4e8e\u5e7e\u500b\u5fae\u5fae\u7db2<\/div>\n<div class=\"content\">\n\t\t\t<\/p>\n<div class=\"ggad\">\n<dl>\n<dd class=\"ggad1\" style=\"float: left\" >\n<\/dd>\n<dd class=\"ggad1\" style=\"float: right\">\n<\/dd>\n<\/dl><\/div>\n\t\t\t<\/p>\n\t\t\t\u3000\u3000<\/p>\n<\/p>\nWhat is Bluetooth\uff1f<\/strong><\/p>\n\u3000\u3000Bluetooth is a universal radio interface in the 2.45GHz frequency band that enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc networks. Each unit can simultaneously communicate with up to sever other units per piconet. Moreover, each unit can simultaneously belong to several piconets.<\/p>\n\u3000\u3000What is Bluetooth Technology\uff1f<\/p>\n\u3000\u3000Bluetooth technology which apart from Ericsson, has gained the support of Nokia, IBM, Toshiba, Intel and many other manufacturers.<\/p>\n\u3000\u3000Eliminates the need for wires, cables and connectors for and between cordless or mobile phones, modems, headsets, PDAs, Computers, printers, projectors, local area networks, and so on, and paves the way for new and completely different devices and applications.Technology Characteristics1Ms\/s symbol rate exploits maximum available channel bandwidth.<\/p>\n\u3000\u3000Fast frequency hopping avoids interference<\/p>\n\u3000\u3000Adaptive output power minimizes interference<\/p>\n\u3000\u3000Short data packets maximize capacity during interference<\/p>\n\u3000\u3000Fast acknowledge allows low coding overhead for links<\/p>\n\u3000\u3000CVSD\uff08Continuous Variable Slope Delta Modulation\uff09voice coding enables operation at high bit- error rates<\/p>\n\u3000\u3000Flexible packet types supports wide application range<\/p>\n <\/font><\/p>\n<\/p>\n\u3000\u3000 Air interface tailored to minimize current consumption<\/font><\/p>\n\u3000\u3000Basic Technical InformationBased upon a small, high performance integrated radio transceiver, each of which is allocated a unique 48-bit address derived from the IEEE 802.standard.<\/font><\/p>\n\u3000\u3000Operate in the unrestricted 2.45GHz ISM free band, Which is available globally although slight variation of location and width of band apply.<\/font><\/p>\n\u3000\u3000Range set at 10m to optimize for target market of mobile and business user<\/font><\/p>\n\u3000\u3000Gross data rate 1Mbit\/s with second generation plans to increase to 1Mbit\/s<\/font><\/p>\n\u3000\u3000One-to-one connections allow maximum data transfer rate of 721kbit\/s \uff083 voice channels\uff09<\/font><\/p>\n\u3000\u3000Uses packet switching protocol based on frequency hop scheme with 1600 hops\/s to enable high performance in noisy radio environments. The entire available frequency spectrum is used with 79 hops of 1Mhz bandwidth, analogous to the IEEE 802.11 standard.<\/font><\/p>\n\u3000\u3000Low power consumption longevity for battery powered devices. During data transfer the maximum current drain is 30mA. However during pauses or at lower data rates will be lower.<\/font><\/p>\n\u3000\u3000\u85cd\u7259\u662f\u4e00\u500b\u983b\u7387\u70ba2.45GHz\u7684\u901a\u7528\u7121\u7dda\u96fb\u901a\u4fe1\u63a5\u53e3\uff0c\u5b83\u901a\u904e\u4e00\u500b\u7279\u6b8a\u7684\u7db2\u7d61\u53ef\u4ee5\u5728\u5404\u7a2e\u4fbf\u651c\u8a2d\u5099\u4e4b\u9593\u5efa\u7acb\u8d77\u7121\u7dda\u9023\u63a5\u5e76\u9032\u884c\u77ed\u7a0b\u901a\u4fe1\u3002\u5728\u4e00\u500b\u5fae\u5fae\u7db2\u4e2d\uff0c\u6bcf\u500b\u55ae\u5143\u90fd\u80fd\u540c\u6642\u8207\u5176\u5b83\u5404\u55ae\u5143\u9032\u884c\u901a\u4fe1\u3002\u800c\u4e14\uff0c\u6bcf\u4e00\u500b\u55ae\u5143\u53ef\u4ee5\u540c\u6642\u5c6c\u4e8e\u5e7e\u500b\u5fae\u5fae\u7db2\u3002<\/font><\/p>\n\u3000\u3000\u4ec0\u4e48\u662f\u85cd\u7259\u6280\u8853\uff1f<\/font><\/p>\n\u3000\u3000\u85cd\u7259\u6280\u8853\u6700\u5148\u662f\u7531\u611b\u7acb\u4fe1\u958b\u59cb\u7814\u5236\u7684\uff0c\u73fe\u5728\u5df2\u7d93\u5f97\u5230\u4e86\u8afe\u57fa\u4e9e\u3001IBM\u3001\u6771\u829d\u3001\u56e0\u7279\u723e\u53ca\u8a31\u591a\u5176\u5b83\u76f8\u95dc\u5236\u9020\u5ee0\u5bb6\u7684\u652f\u6301\u3002\u5176\u76ee\u7684\u662f\u70ba\u4e86\u514d\u9664\u5728\u7121\u7e69\u96fb\u8a71\u6216\u79fb\u52d5\u96fb\u8a71\u3001\u8abf\u5236\u89e3\u8abf\u5668\u3001\u982d\u5957\u5f0f\u9001\/\u53d7\u8a71\u5668\u3001PDAs\u3001\u8a08\u7b97\u6a5f\u3001\u6253\u5370\u6a5f\u3001\u5e7b\u71c8\u6a5f\u3001\u5c40\u57df\u7db2\u7b49\u4e4b\u9593\u52a0\u88dd\u96fb\u7dda\u3001\u96fb\u7e9c\u548c\u9023\u63a5\u5668\u3002\u800c\u4e14\uff0c\u9019\u7a2e\u6280\u8853\u53ef\u4ee5\u5ef6\u4f38\u5230\u90a3\u4e9b\u5b8c\u5168\u4e0d\u540c\u7684\u65b0\u8a2d\u5099\u548c\u65b0\u61c9\u7528\u4e2d\u53bb\u3002\u85cd\u7259\u7684\u6280\u8853\u7279\u6027\u4ee5\u6bcf\u79d21M\u500b\u78bc\u5143\u7684\u5b57\u7b26\u901f\u7387\u50b3\u8f38\uff0c\u5145\u5206\u5229\u7528\u4fe1\u9053\u7684\u6700\u5927\u6709\u6548\u5e36\u5bec\u3002<\/font><\/p>\n <\/font><\/font><\/p>\n<\/p>\n\u3000\u3000\u5feb\u901f\u8df3\u983b\u907f\u514d\u5e72\u64fe<\/font><\/font><\/p>\n\u3000\u3000\u53ef\u8b8a\u7684\u96fb\u6e90\u8f38\u51fa\u4f7f\u5e72\u64fe\u6e1b\u5c0f\u5230\u6700\u5c0f<\/font><\/font><\/p>\n\u3000\u3000\u91c7\u7528\u77ed\u6578\u64da\u5305\u50b3\u8f38\u589e\u5f37\u6297\u5e72\u64fe\u80fd\u529b<\/font><\/font><\/p>\n\u3000\u3000\u5feb\u901f\u78ba\u8a8d\u5141\u8a31\u6709\u9644\u52a0\u4f4e\u901f\u7387\u7684\u7de8\u78bc\u88ab\u767c\u9001\u5230\u93c8\u8def\u4e0a<\/font><\/font><\/p>\n\u3000\u3000\u9023\u7e8c\u53ef\u8b8a\u659c\u7387\u589e\u91cf\u8abf\u5236\u7684\u8a9e\u97f3\u7de8\u78bc\u53ef\u4ee5\u5728\u9ad8\u8aa4\u78bc\u7387\u7684\u60c5\u6cc1\u4e0b\u6b63\u5e38\u5de5\u4f5c<\/font><\/font><\/p>\n\u3000\u3000\u9748\u6d3b\u7684\u5206\u7d44\u985e\u578b\u652f\u6301\u591a\u7a2e\u61c9\u7528<\/font><\/font><\/p>\n\u3000\u3000\u7121\u7dda\u96fb\u7a7a\u4e2d\u63a5\u53e3\u4f7f\u96fb\u8017\u9054\u5230\u6700\u5c0f\u85cd\u7259\u57fa\u672c\u6280\u8853\u6982\u8981<\/font><\/font><\/p>\n\u3000\u3000\u6bcf\u4e00\u500b\u5c0f\u578b\u3001\u9ad8\u6027\u80fd\u3001\u96c6\u6210\u7684\u7121\u7dda\u96fb\u6536\u767c\u6a5f\u90fd\u6709IEEE 802\u6a19\u6e96\u6240\u898f\u5b9a\u7684\u4e00\u500b\u552f\u4e00\u768448\u6bd4\u7279\u4f4d\u5730\u5740<\/font><\/font><\/p>\n\u3000\u3000\u958b\u653e\u76842.45GHz ISM\u81ea\u7531\u983b\u6bb5\uff0c\u5168\u7403\u90fd\u53ef\u4ee5\u81ea\u7531\u4f7f\u7528\u3002<\/font><\/font><\/p>\n\u3000\u300010\u516c\u91cc\u662f\u6700\u9069\u4e8e\u79fb\u52d5\u901a\u4fe1\u5e02\u5834\u548c\u5546\u696d\u7528\u6236\u7684\u901a\u4fe1\u8303\u570d<\/font><\/font><\/p>\n\u3000\u3000\u7e3d\u901f\u7387\u70ba1Mbit\/s\uff0c\u8a08\u5283\u4e0b\u4e00\u4ee3\u7522\u54c1\u5c07\u9054\u52302Mbit\/s<\/font><\/font><\/p>\n\u3000\u3000\u9ede\u5230\u9ede\u9023\u63a5\u5141\u8a31\u7684\u6700\u5927\u6578\u64da\u50b3\u8f38\u901f\u7387\u70ba721kbit\/s<\/font><\/font><\/p>\n\u3000\u3000\u5728\u7121\u7dda\u96fb\u566a\u8072\u74b0\u5883\u91cc\uff0c\u5229\u7528\u57fa\u4e8e\u6bcf\u79d21600\u8df3\u8df3\u983b\u8868\u7684\u5206\u7d44\u4ea4\u63db\u5354\u8b70\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7d71\u6027\u80fd\u3002\u4ee5 1Mhz\u5e36\u5bec79\u8df3\u4f86\u5229\u7528\u9019\u500b\u5b8c\u6574\u7684\u53ef\u7528\u983b\u8b5c\u3002\u9019\u985e\u4f3c\u4e8eIEEE 802.11\u6a19\u6e96\u3002<\/font><\/font><\/p>\n\u3000\u3000\u4f4e\u96fb\u80fd\u7684\u6d88\u8017\u3002\u5728\u5099\u7528\u6a21\u5f0f\u4e0b\u50c5\u97000.3mA\uff0c\u9019\u80fd\u5ef6\u9577\u90a3\u4e9b\u4f7f\u7528\u96fb\u6c60\u4f9b\u96fb\u8a2d\u5099\u7684\u58fd\u547d\u3002\u6578\u64da\u50b3\u9001\u6642\u96fb\u6d41\u7684\u6700\u5927\u6d88\u8017\u70ba30mA.\u7576\u66ab\u505c\u5de5\u4f5c\u6216\u4f4e\u901f\u50b3\u9001\u6578\u64da\u6642\u96fb\u6d41\u6d88\u8017\u66f4\u4f4e\u3002<\/font><\/font><\/p>\n<\/font><\/p>\n<\/p><\/div>\n \n\t\t\t<a href=\"http:\/\/tutor.howang.hk\/\">\u4e0a\u9580\u88dc\u7fd2<\/a><\/b><\/p>\n<div align=\"center\"><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/body> \n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD XHTML 1.0 Transitional\/\/EN\" 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{"id":336,"date":"2010-07-30T21:45:39","date_gmt":"2010-07-31T05:45:39","guid":{"rendered":"http:\/\/tutor.howang.hk\/tag\/?p=336"},"modified":"2010-07-30T21:45:39","modified_gmt":"2010-07-31T05:45:39","slug":"%e4%bb%80%e4%b9%88%e5%8f%ab%e2%80%9c%e8%97%8d%e7%89%99%e2%80%9d","status":"publish","type":"post","link":"https:\/\/www.hktutorcity.com\/tag\/%e4%bb%80%e4%b9%88%e5%8f%ab%e2%80%9c%e8%97%8d%e7%89%99%e2%80%9d\/","title":{"rendered":"\u4ec0\u4e48\u53eb\u201c\u85cd\u7259\u201d"},"content":{"rendered":"

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\n\u4ec0\u4e48\u53eb\u201c\u85cd\u7259\u201d<\/title> \n<\/head><\/p>\n<body><\/p>\n<table width=\"92%\" align=\"center\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td height=\"37\">\n<div align=\"center\">\n<h1><a href=\"http:\/\/tutor.howang.hk\/\">\u88dc\u7fd2<\/strong><\/a>-\u4ec0\u4e48\u53eb\u201c\u85cd\u7259\u201d<\/h1>\n<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#f7f7f7\" height=\"20\">\n<div align=\"center\">http:\/\/tutor.howang.hk\/-<a href=\"http:\/\/tutor.howang.hk\/\">\u9999\u6e2f\u88dc\u7fd2\u57ce<\/strong><\/a><\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td align=\"center\" height=\"1\">\n<hr width=\"95%\" noshade=\"noshade\" size=\"1\" \/><\/td>\n<\/tr>\n<tr>\n<td>\n<div align=\"right\"><\/div>\n <a href=\"http:\/\/tutor.howang.hk\/\">\u88dc\u7fd2\u4ecb\u7d39<\/a><\/b>\u4ec0\u4e48\u53eb\u201c\u85cd\u7259\u201d\u85cd\u7259\u662f\u4e00\u500b\u983b\u7387\u70ba2.45GHz\u7684\u901a\u7528\u7121\u7dda\u96fb\u901a\u4fe1\u63a5\u53e3\uff0c\u5b83\u901a\u904e\u4e00\u500b\u7279\u6b8a\u7684\u7db2\u7d61\u53ef\u4ee5\u5728\u5404\u7a2e\u4fbf\u651c\u8a2d\u5099\u4e4b\u9593\u5efa\u7acb\u8d77\u7121\u7dda\u9023\u63a5\u5e76\u9032\u884c\u77ed\u7a0b\u901a\u4fe1\u3002\u5728\u4e00\u500b\u5fae\u5fae\u7db2\u4e2d\uff0c\u6bcf\u500b\u55ae\u5143\u90fd\u80fd\u540c\u6642\u8207\u5176\u5b83\u5404\u55ae\u5143\u9032\u884c\u901a\u4fe1\u3002\u800c\u4e14\uff0c\u6bcf\u4e00\u500b\u55ae\u5143\u53ef\u4ee5\u540c\u6642\u5c6c\u4e8e\u5e7e\u500b\u5fae\u5fae\u7db2<\/div>\n<div class=\"content\">\n\t\t\t<\/p>\n<div class=\"ggad\">\n<dl>\n<dd class=\"ggad1\" style=\"float: left\" >\n<\/dd>\n<dd class=\"ggad1\" style=\"float: right\">\n<\/dd>\n<\/dl><\/div>\n\t\t\t<\/p>\n\t\t\t\u3000\u3000<\/p>\n<\/p>\nWhat is Bluetooth\uff1f<\/strong><\/p>\n\u3000\u3000Bluetooth is a universal radio interface in the 2.45GHz frequency band that enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc networks. Each unit can simultaneously communicate with up to sever other units per piconet. Moreover, each unit can simultaneously belong to several piconets.<\/p>\n\u3000\u3000What is Bluetooth Technology\uff1f<\/p>\n\u3000\u3000Bluetooth technology which apart from Ericsson, has gained the support of Nokia, IBM, Toshiba, Intel and many other manufacturers.<\/p>\n\u3000\u3000Eliminates the need for wires, cables and connectors for and between cordless or mobile phones, modems, headsets, PDAs, Computers, printers, projectors, local area networks, and so on, and paves the way for new and completely different devices and applications.Technology Characteristics1Ms\/s symbol rate exploits maximum available channel bandwidth.<\/p>\n\u3000\u3000Fast frequency hopping avoids interference<\/p>\n\u3000\u3000Adaptive output power minimizes interference<\/p>\n\u3000\u3000Short data packets maximize capacity during interference<\/p>\n\u3000\u3000Fast acknowledge allows low coding overhead for links<\/p>\n\u3000\u3000CVSD\uff08Continuous Variable Slope Delta Modulation\uff09voice coding enables operation at high bit- error rates<\/p>\n\u3000\u3000Flexible packet types supports wide application range<\/p>\n <\/font><\/p>\n<\/p>\n\u3000\u3000 Air interface tailored to minimize current consumption<\/font><\/p>\n\u3000\u3000Basic Technical InformationBased upon a small, high performance integrated radio transceiver, each of which is allocated a unique 48-bit address derived from the IEEE 802.standard.<\/font><\/p>\n\u3000\u3000Operate in the unrestricted 2.45GHz ISM free band, Which is available globally although slight variation of location and width of band apply.<\/font><\/p>\n\u3000\u3000Range set at 10m to optimize for target market of mobile and business user<\/font><\/p>\n\u3000\u3000Gross data rate 1Mbit\/s with second generation plans to increase to 1Mbit\/s<\/font><\/p>\n\u3000\u3000One-to-one connections allow maximum data transfer rate of 721kbit\/s \uff083 voice channels\uff09<\/font><\/p>\n\u3000\u3000Uses packet switching protocol based on frequency hop scheme with 1600 hops\/s to enable high performance in noisy radio environments. The entire available frequency spectrum is used with 79 hops of 1Mhz bandwidth, analogous to the IEEE 802.11 standard.<\/font><\/p>\n\u3000\u3000Low power consumption longevity for battery powered devices. During data transfer the maximum current drain is 30mA. However during pauses or at lower data rates will be lower.<\/font><\/p>\n\u3000\u3000\u85cd\u7259\u662f\u4e00\u500b\u983b\u7387\u70ba2.45GHz\u7684\u901a\u7528\u7121\u7dda\u96fb\u901a\u4fe1\u63a5\u53e3\uff0c\u5b83\u901a\u904e\u4e00\u500b\u7279\u6b8a\u7684\u7db2\u7d61\u53ef\u4ee5\u5728\u5404\u7a2e\u4fbf\u651c\u8a2d\u5099\u4e4b\u9593\u5efa\u7acb\u8d77\u7121\u7dda\u9023\u63a5\u5e76\u9032\u884c\u77ed\u7a0b\u901a\u4fe1\u3002\u5728\u4e00\u500b\u5fae\u5fae\u7db2\u4e2d\uff0c\u6bcf\u500b\u55ae\u5143\u90fd\u80fd\u540c\u6642\u8207\u5176\u5b83\u5404\u55ae\u5143\u9032\u884c\u901a\u4fe1\u3002\u800c\u4e14\uff0c\u6bcf\u4e00\u500b\u55ae\u5143\u53ef\u4ee5\u540c\u6642\u5c6c\u4e8e\u5e7e\u500b\u5fae\u5fae\u7db2\u3002<\/font><\/p>\n\u3000\u3000\u4ec0\u4e48\u662f\u85cd\u7259\u6280\u8853\uff1f<\/font><\/p>\n\u3000\u3000\u85cd\u7259\u6280\u8853\u6700\u5148\u662f\u7531\u611b\u7acb\u4fe1\u958b\u59cb\u7814\u5236\u7684\uff0c\u73fe\u5728\u5df2\u7d93\u5f97\u5230\u4e86\u8afe\u57fa\u4e9e\u3001IBM\u3001\u6771\u829d\u3001\u56e0\u7279\u723e\u53ca\u8a31\u591a\u5176\u5b83\u76f8\u95dc\u5236\u9020\u5ee0\u5bb6\u7684\u652f\u6301\u3002\u5176\u76ee\u7684\u662f\u70ba\u4e86\u514d\u9664\u5728\u7121\u7e69\u96fb\u8a71\u6216\u79fb\u52d5\u96fb\u8a71\u3001\u8abf\u5236\u89e3\u8abf\u5668\u3001\u982d\u5957\u5f0f\u9001\/\u53d7\u8a71\u5668\u3001PDAs\u3001\u8a08\u7b97\u6a5f\u3001\u6253\u5370\u6a5f\u3001\u5e7b\u71c8\u6a5f\u3001\u5c40\u57df\u7db2\u7b49\u4e4b\u9593\u52a0\u88dd\u96fb\u7dda\u3001\u96fb\u7e9c\u548c\u9023\u63a5\u5668\u3002\u800c\u4e14\uff0c\u9019\u7a2e\u6280\u8853\u53ef\u4ee5\u5ef6\u4f38\u5230\u90a3\u4e9b\u5b8c\u5168\u4e0d\u540c\u7684\u65b0\u8a2d\u5099\u548c\u65b0\u61c9\u7528\u4e2d\u53bb\u3002\u85cd\u7259\u7684\u6280\u8853\u7279\u6027\u4ee5\u6bcf\u79d21M\u500b\u78bc\u5143\u7684\u5b57\u7b26\u901f\u7387\u50b3\u8f38\uff0c\u5145\u5206\u5229\u7528\u4fe1\u9053\u7684\u6700\u5927\u6709\u6548\u5e36\u5bec\u3002<\/font><\/p>\n 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