Two-way transports can send and receive messages using the same channel.

双向传输可以使用同一个通道发送和接收消息。

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Thus, distinguishes between two kinds of battery electrolyte "fixed" way and provide oxygen to the cathode channel differently, thus the performance of the two kinds of battery also.

由此看出，两种电池的区别就在于电解液的“固定”方式和提供氧气到达负极通道的方式有所不同，因而两种电池的性能也也。

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One way is what is called two-channel authentication, using something other than the computer - most likely a cellphone - as part of the log-on procedure.

一种方法是所谓的双通道验证，使用的不是电脑-最有可能是手机-作为登录程序。

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Whereas traditional systems require the use of one or two dedicated channels per user every time there is a two-way communications, trunked systems automatically select the voice channel that a user may talk on every time he transmits.

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