I think now would be a particularly bad time to send a signal to the international community and to our overall financial system by playing politics in any way with this upcoming vote,".

VOA: standard.2010.01.24

Each one of those electrodes allows us to measure, we plot voltage verses time, ? this signal coming from the tip of that electrode. Ok?

我们通过每个这样的电极都可以设计一种测量方法，我们设计电压比时间，这一信号源于电极的一端，对吧？

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It can also happen in other ways, it could be a G-protein coupled receptor which we talked about last time, which indirectly activates another ion channel to start the electrical signal.

还可以有其他方式,可以通过G蛋白偶联受体,这我们上次谈过,它可以间接激活,另一个离子通道以开启电信号

耶鲁公开课 - 生物医学工程探索课程节选

But they say it sends an appropriate signal that says the U.S.will not give up, and at the same time the troops will not stay in the region a day more than they must.

VOA: standard.2009.12.06

There are molecules in cells that give the DNA the signal that it's time to transcribe and express a gene, those are called transcription factors, we'll talk about them a bit later.

在细胞中有些分子能够,给DNA发出信号告诉它,是时候转录和表达某基因了,这些分子叫做转录因子,晚些时候我们会讲它们

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