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关注：1
2013-05-23 12:21
求翻译：1972年，国际电报电话咨询委员会(CCITT)首次提出综合业务数字网—ISDN的概念。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
1972年，国际电报电话咨询委员会(CCITT)首次提出综合业务数字网—ISDN的概念。
问题补充： |
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2013-05-23 12:21:38
In 1972, the International Telegraph and telephone Consultative Committee (CCITT) first proposed-ISDN the concept of integrated services digital network.
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2013-05-23 12:23:18
In 1972, the Advisory Committee on International Telephone and Telegraph (CCITT) submitted for the first time an Integrated Services Digital Network - ISDN concept.
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2013-05-23 12:24:58
正在翻译，请等待...
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2013-05-23 12:26:38
In 1972, the International Telegraph and telephone Consultative Committee (CCITT) first proposed-ISDN the concept of integrated services digital network.
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2013-05-23 12:28:18
In 1972, the International Telegraph and telephone Consultative Committee (CCITT) first proposed-ISDN the concept of integrated services digital network.
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