Some of the potential reagents are very fragile and will need to be used at cryogenic temperatures, but the elimination of an atom of an almost inert gas can simplify the chemistry.

有些可能的试剂非常不稳定，需在低温下使用，但是，如果一个原子的几乎是惰性的气体消除了，就能够让化学过程简化多了。

youdao

Finesse comes from the ability to analyse small quantities accurately. And the smallest possible quantity in chemistry is, of course, a single atom.

能够进行准确的微量分析才算得上精细，而化学意义上的最小量无疑就是单一的原子。

youdao

A methyl group is a basic unit in organic chemistry: one carbon atom attached to three hydrogen atoms.

甲基是有机化学的基本单位：一个碳原子连接三个氢原子。

youdao

It makes sense, right, because they're the furthest away from the nucleus, they're the ones that are most willing to be involved in some chemistry or in some bonding, or those are the orbitals that are most likely to accept an electron from another atom, for example. So the valence electrons, those are the exciting ones.

它讲得通，对，因为它们距离,原子核最远，它们是最容易发生,化学反应和结合的地方，另一个原子的电子的轨道或者它们是,最容易接受，举个例子所以价电子，他们是活跃的电子。

麻省理工公开课 - 化学原理课程节选