While each box contains a beacon, the unit only has enough battery power to transmit a signal for 30 days.

虽然每个盒子里都有一个信标，但这个装置的电池只能够传输30天信号。

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"It will signal a dramatic shift to a cleaner, more sustainable method of providing frequency regulation on the grid," Beacon CEO Bill Capp told the GridWeek conference in Washington last week.

“这是一个巨大的改变，我们可以用更环保、更持续的方法来让电网实现频率的调整。” 灯塔公司首席执行官比尔·凯普上周在华盛顿出席电网周（GridWeek）大会时说道。

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BEACON, a device which emits a signal for use as a guidance or warning aid.

信标，发射引导或警告用信号的装置。

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The three fishermen's vessel didn't have an Emergency Position Indicating Radio Beacon, which transmits a distress signal anywhere in the world through a satellite system, the navy said.

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