铁和水及空气发生反应产生铁锈。

Iron reacts with water and air to produce rust.

《牛津词典》

二氧化碳一旦进入水中，就会发生反应形成碳酸。

Once in the water, it reacts to form carbonic acid.

youdao

不和水发生反应。

It's not reacting with the water.

youdao

What's happening there? Well, the selection of reactants has been done judiciously to provide either heat or to provide something that's cool.

就会感到这东西，比如说变冷了，对吧？,这里发生了什么？这些反应物都是,被仔细的选出来的，能够提供热量或制冷。

麻省理工公开课 - 热力学与动力学课程节选

And then, of course, not just whether the reaction will occur but, how fast it occurs is really important.

当然，我们不光要研究一个反应会不会发生,反应速率多块也是很重要的研究问题。

麻省理工公开课 - 化学原理课程节选

Because that will take care of all of the electrons that are capable of reacting, none of the inner shell electrons.

因为那样我们可以考虑到,除内层电子以外，所有可以发生反应的电子。

麻省理工公开课 - 固态化学导论课程节选