Metal ionic compounds play an important role in fluorescent molecule switch.

金属离子络合物是荧光分子开关的一个重要组成部分。

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The genetic switch involves acetylation, the introduction of an acetyl group into a molecule at the DNA level of chromatin resulting in genetic transcription.

基因“开关”涉及乙酰化作用，也就是将乙酰基群在染色质的DNA水平上引入到分子中，由此完成基因转录。

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Their original experiment used a genetic switch to regulate production of a particular receptor molecule for serotonin.

在最初的实验中，他们采用了一个基因开关来调节复合胺的一种特定的受体分子的产生。 为了得到SID症的模式，他们对基因开关做了调整。

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So if we do this and we form the molecule ammonia, let's switch to a clicker question, and have you tell me what the bond angle - is going to be in ammonia -- HNH Actually, let me draw it on the board as you look -- actually, can you put the class notes on, since you don't actually have your notes to refer to.

如果这样做的话，我们就可以形成氨分子，让我们来做一个课堂练习,你们告诉我氨分子中的键角是多少-,键角，the，h，n，h，bond，angle。,实际上让我在黑板上画出它来，这样你们可以看到实际上-,你能把课堂讲义放出来吗，因为你们没有讲义可以参考。

麻省理工公开课 - 化学原理课程节选

Scientists have used chromophores for decades to detect chemicals, but, until Fido, they weren't sensitive enough to detect trace explosives because each molecule of TNT vapor would switch off just a single chromophore, with the result that faint wisps of evil chemicals caused no visible change in luminosity.

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Their original experiment used a genetic switch to regulate production of a particular receptor molecule for serotonin.

ECONOMIST: Sudden infant death syndrome

Last year Hewlett-Packard, along with a team of scientists from UCLA, proved the ability to make a switch that could be turned off and on, like a transistor, out of a single organic molecule called a catenane.

FORBES: The Science of Small