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。

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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.

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

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