The heater is on, it's producing heat until a negative signal is registered, 'oh we've gone too high', and then it turns off.

加热器会开着,一直产生热量直到它得到一个关闭的信号,噢我们弄得太热了,然后就关闭了

耶鲁公开课 - 生物医学工程探索课程节选

This is the Renaissance Hotel. And it was closed for 80 years,

这是万丽酒店。它已经关闭八十年了，

万丽酒店的魅力 - SpeakingMax英语口语达人

It makes no sense to think that it could try to kill the people who are trying to shut it down and so forth."

它会有试图杀死要将程序关闭的人等其他举动,这些完全说不通

耶鲁公开课 - 死亡课程节选

If the temperature drops below a certain level it sends a signal, 'turn on the heat', and that signal stays on until it gets a negative signal to turn off.

如果温度降到一定程度以下时,探测器会发送一个信号,打开加热器,直到加热器再收到关闭的信号,它就会一直开着

耶鲁公开课 - 生物医学工程探索课程节选

So, for example, if we look at sodium channels, and sodium channels are some of the particularly prevalent ones when we're talking about neurons, if you think about the cell membrane, and this little green cartoon is me trying to show a sodium channel here, and in this case, you can see that it's closed, such that no ions are getting through.

比如，让我们来看一下钠离子通道，钠离子通道是我们会经常遇到的几个之一,在讨论神经元的时候，如果大家想想细胞膜，而这个绿色的小示意图就是我用来表示,钠离子通道的，在这种情况下，大家可以看到它是关闭的，因此没有离子可以通过。

麻省理工公开课 - 化学原理课程节选

And Hal says, as Dave begins to shut down Hal's circuits, "I'm afraid. I'm afraid, Dave."

当戴夫开始关闭它的电路时,哈尔说,我害怕,我害怕,戴夫

耶鲁公开课 - 死亡课程节选

I couldn't have told you, for example, if we look at a phosphate group, that that's going to be incredibly important in DNA, that it's also an incredibly important group when you're dealing with proteins and whether you're turning the function of a protein on or off.

怎么和化学反应相联系起来的，更不记得其它我更不感兴趣的规律,我不能告诉你，如果我们看磷酸盐,它们对于构成DNA十分重要,也是构成蛋白质的重要组份,它是否能打开或关闭一个蛋白质的功能。

麻省理工公开课 - 化学原理课程节选