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| 普遍服务 | |||
| 普遍的电话服务一种以全体美国公民均能承受的价格提供基本电话服务的政策；自 1908年以来长期成为 Bell System 的重要宣传口号 | |||
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| 普遍服务 | |||
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universal service : 34 phrases in 8 subjects |
| Aviation | 7 |
| China | 1 |
| Earth sciences | 1 |
| Electronics | 14 |
| Finances | 1 |
| Information technology | 4 |
| Multimedia | 1 |
| Telecommunications | 5 |
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