The chemical reaction that follows is very complex and continues for many years, and the concrete just keeps getting harder.

接下来的化学反应非常复杂，会持续很多年，混凝土只会变得越来越硬。

youdao

In the past, there was often an automatic reaction to increased traffic: just widen the roads, says Mark Poch, the Bellevue Transportation Department's traffic engineering manager.

贝尔维尤运输部交通工程经理马克·波奇说，过去，人们对交通量的增加往往有一种自动的反应：只要拓宽道路就行了。

youdao

I can just imagine his reaction.

我完全可以想象出他的反应。

《牛津词典》

And it was a remarkable reaction of just patting us on the back, smiling and ushering us up to the front so that we could see it."

VOA: standard.2010.07.26

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

But, I think what most of you, actually having MIT come to MIT, have probably realized is sometimes it's nice to major in a science, because you can't just pick up a reaction and do it in your kitchen on the weekend, where as you can sometimes join a book group and do that.

但我认为对你们大多数人来说,既然来了,可能已经意识到最好是主修一门科学,因为你不能在你,周末的时候在厨房里做化学实验,然后你就可以参加一个读书俱乐部。

麻省理工公开课 - 化学原理课程节选

That is exactly what acupuncture does but rather than trying to cause just one reaction (a sneeze), acupuncture can stimulate a very wide range of self regulatory reactions.

FORBES: Does NIH recommend acupuncture?

Meryl, it was just a reaction shot in the audience.

BBC: NEWS | Entertainment | Stuck on Cher

"It's not just about having an initial reaction and then kind of just petering out, " she said.

CNN: Guiding children through grief and loss