Her major concern is to keep the communication line with her daughter open.

她主要关心的是保持与女儿的交流畅通。

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Any modification may lead to updating each unique communication line in its own way.

任何修改都可能会按其自身的方式更新每条唯一的通信线路。

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Multiplex: The transmission of multiple signals over a single communication line or computer channel.

多路：在一个信息通道上或电脑通路上同时传送多个信号的情况。

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If engineers can keep a communication line open to the craft, they can begin to diagnose its problems.

BBC: Signal picked up from Russia's stranded Mars probe

On Feb. 18, a communication line malfunction disrupted the dissemination of last sale price data on Nasdaq for two hours.

CNN: Software glitch forces brief shutdown of Nasdaq

Sponsor assumes no responsibility for any error, omission, interruption, deletion, defect, delay in operation or transmission, communication line failure, theft or destruction or unauthorized access to, or alteration of, entries.

WSJ: Blindfold Brackets 2013: Official Rules