OK, so now the question is, how do we know the first place that this is a suitable reductant?

好的，现在的问题是，我们如何能知道第一步中,镁是一个合适的还原剂？

麻省理工公开课 - 固态化学导论课程节选

She needs to know this enzyme works by both acid base chemistry, and oxidation reduction.

她要知道酶催化，她需要知道这种酶,在酸碱环境下的反应和氧化还原反应。

麻省理工公开课 - 化学原理课程节选

So what you'll be hearing are approximations as best we can make them of what's going on.

因此 你们将会学到的是,我们尽可能还原的真实情况

耶鲁公开课 - 古希腊历史简介课程节选

We can kind of freeze dry this thing and store it and then bring it back to life more or less exactly as the composer had intended.

我们相当于把这件作品干燥冷藏起来,并能够还原作品,比较精确地吻合作曲家的原意

耶鲁公开课 - 聆听音乐课程节选

We have people inventing them, but even the ones that are invented aren't very helpful, because it's awfully hard to know how they did what they did.

有人试图还原古代战争,但是得出的结果并没有太大的意义,因为我们对此实在是知之甚少

耶鲁公开课 - 古希腊历史简介课程节选