In a receive mode, either the sum channel or a difference channel of the panel combiner is chosen as the active channel.

在接收方式下，选择面板组合器的和通道或差通道作为工作通道。

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It shows that the active channel with sizeable optical gain and a substantial increase of the refractive index are promising for the realization of active waveguide tunable laser.

研究表明，室温下有源沟道具有较大的光增益和折射率增量，有望实现可见波段的可调谐有源光波导激光器件。

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Because of MediaWiki's popularity, it boasts an active IRC support channel on freenode — #mediawiki — as well as multiple forums on which users interchange ideas and questions.

由于 MediaWiki 很受欢迎，它在自由节点（#mediawiki）上拥有一个活动 IRC 支持渠道，并拥有多个论坛，用户可在上面交流观点和问题。

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The five two-way speakers each hold two three-inch drivers and a one-inch tweeter, while each of the two 70 watts-per-channel active subwoofers has a roughly eight-inch cone.

FORBES: Sounding Out Home Theater

In 2003, Stanford University spin-out company Cooligy showed off its Active Micro-Channel Cooling (AMC) technology which allowed fluids to circulate through hundreds of tiny channels on the upper surface of a chip.

BBC: IBM aims to cool chips with water

Stop worrying about being active in every possible channel where your target customer might be.

FORBES: Small Business Marketing: Making Sense of Too Many Choices