其它日本汽车制造商已经开始着手制造燃料电池汽车，这种汽车通过氧和氢的化学反应来发电，而这种化学反应的副产品只有水。

Other Japanese automakers have been working to create fuel cell cars, which produce electricity through a chemical reaction between hydrogen and oxygen, with water the only by-product.

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但这个发现的重要意义在于，包括氧气产生在内的化学作用也发生在我们太阳系的其它地方。并且，这样的化学反应在太阳系以外也可能同样非常普遍。

But the discovery is significant in that it proves that chemistry involving oxygen occurs naturally elsewhere in our own solar system, and could be quite common outside of it as well.

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研究团队没有发现疟疾的进一步证据，最初发现疟疾的测试因此作废，因为有时测试会同其它物质发生交叉化学反应。

The team found no further evidence of malaria, and the test that originally detected it has since been withdrawn as it can sometimes cross-react with other substances.

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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