The sine signal from the mixer was turned to the square signal by a reshape circuit.

通过整形电路，使混频后的正弦信号变为方波信号。

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In some cases the specific change triggers a signal - the folded or square position may activate some other enzyme, or open a channel in a cell.

在某些情况下特别的变化能触发一个信号——折叠的或方形的状态将激活一些其他的酶，或在细胞中打开一个通道。

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She organized a group of about 150 local businesspeople to lurk around Copley Square and, after a secret signal, in broad daylight to burst into a dance they'd rehearsed.

她组织了约150名当地商户业主，潜伏在柯普利广场附近。 然后根据秘密的信号，所有人突然蹦出来，在光天化日之下就开始跳起事先排练好的舞蹈。

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Plano, Texas was able to serve 7.5 square miles per fire station with signal preemption, compared with 5.6 square miles without it.

FORBES: Magazine Article

Plano, Tex. was able to serve 7.5 square miles per fire station with signal preemption, compared with 5.6 square miles without it.

FORBES: Magazine Article

The station is also planning to install a transmitter and antenna system in Times Square to enhance its signal.

FORBES: Name You Need to Know: Cephas Bowles