动物发出的许多信号似乎使信号传递者付出了过于沉重的代价。

Many signals that animals make seem to impose on the signalers costs that are overly damaging.

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脉冲光会跟着一起散开，并会渗入噪音并使信号损失。

Pulses of light can bleed together, adding noise and degrading the signal.

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影响信号并使信号中的信息失真的一种干扰。

A disturbance that affects a signal and that may distort the information carried by the signal.

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So, in order to have fast transmission you do that by transmitting electrical signals; that happens pretty quickly.

所以 为了使信号迅速地传播,细胞使用电信号,它速度非常快

耶鲁公开课 - 生物医学工程探索课程节选

It can be very stressful especially because we don't get cell phone reception down there.

这可以使人很紧张，尤其是因为在地铁站我们的手机没信号。

纽约的交通手段 - SpeakingMax英语口语达人