called subscriber free signal 被叫用户空闲信号
You can read Lashinsky's story — and the rest of the May 23 Fortune 500 issue — on the iPad for free if you are a Fortune subscriber.
如果您订阅了《财富》杂志,就可以在iPad上免费阅读5月23日出版的“财富美国500强”这一期上拉辛斯基故事的其余部分。
Free communication means that whenever and wherever any subscriber can have whatever telecommunication service predetermined with any other subscriber.
无约束通信指的是任何用户可在任何时候、任何地方同其他任何用户实现自己预定的任何电信业务。
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