例如，金不会起反应，但是在纳米尺度上它就成为了反应的催化剂。

For example, gold is nonreactive but at the nanoscale it becomes a catalyst for reactions.

youdao

它能描述大量的化学反应，更一般来说，对于我们下面用来对比的化学反应，你在实验室中测量这些反应的时间尺度。

So it can describe an enormous amount of chemical activity. More commonly, for stuff that we're going to compare to, you might measure in the lab.

youdao

我们同样用动理学结果来描述，很大的反应的时间尺度。

We also use kinetics to describe an enormous range of time scales.

youdao