代谢组学研究代谢物，即人体细胞内持续进行的成千上万化学反应的副产品。

Metabolomics studies metabolites, the by-products of the hundreds of thousands of chemical reactions that continuously go on in every cell of the human body.

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酶是能加速生物学反应速率的催化剂。

Enzymes are catalysts that accelerate the rates of biological reactions.

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血清学反应表明两者有一定的同源性。

The strains from both hosts showed partial homology in serological reaction.

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So let's just to see how you run through some of those calculations. Now let me just ask who here took 5.111? And who here took 5.112?

那么让我们看看怎样,推导这些反应，现在让我问一下,这里有谁学过5。111？谁学过5。112？

麻省理工公开课 - 热力学与动力学课程节选

What I am going to do next day is go into the larger stoichiometry and understand the principles of mass balance and reactivity But before you go,hold it,I don't want you racing off.

下堂课我要做的是,讨论化学计量学，和,质量平衡很反应定律,但在下课之前，我不希望你们这么快走。

麻省理工公开课 - 固态化学导论课程节选