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But in hard drives where we actually have these moving platters, here is in fact, how we get from electricity and magnetism to those zeros and ones.
但是在传统硬盘中我们确实有高速运转的磁盘，这就是事实，但问题是我们如何,把电磁信号转化为0和1的。
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And,you may or may not be intested in the motion, as I am, but you might say: what is the signal good for?
对于情感来说，你们或许有兴趣，也有可能和我一样觉得没意思，但你会问，这种信号什么用处？
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So this is not a very positive sign and people are having a bad relationship with food.
这不是个正面的信号,人们和食物之间的关系变糟
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How do your kidneys know what the status is of inside your blood, They know that because they receive signals from the endocrine system and the nervous system.
肾脏何以得知血液组分的状态,它们能够知道这些是因为它们接收到,来自内分泌系统和神经系统的信号
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It won't be long before we're using these same kind of devices to both record--to test what's going on-- and to act in the right way and response.
相信不久以后,这个装置就可以同时记录和反馈,大脑的信号,并做出相应的回应
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Now, in this cartoon here I've shown a variety of different receptors just to show just to remind you of the different families of receptor molecules that could be involved in receiving and translating a signal.
这个动画中,我向你们展示了各式各样的受体,为了让你们记住不同族的受体分子,它们都涉及信号的接受和翻译过程
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Here, what's different between autocrine and paracrine is that there's some distance between the cell that produces the signal and the cell that receives the signal, but it's not too great a distance because the blood system doesn't have to be involved.
自分泌和旁分泌的区别在于,旁分泌中,产生信号的细胞和接收信号的细胞,之间存在着一定的距离,但这个距离并不远,因为血液系统并不参与
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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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It gets produced in response to a signal so there's a binding of a ligand to a receptor, the enzyme that does this conversion is activated and more cycle AMP is released.
这类分子的产生是对信号做出的一种反应,当配体和受体结合时,催化这种转化过程的酶被激活,更多的cAMP释放出来
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