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

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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。

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