If you take some from column one or two and you mix it with some from column eight and nine, bingo, you have reaction.

如果你从第一列或者第二列中选出一些元素,将其与第8列或者第9列的元素混合，好，就会发生化学反应。

麻省理工公开课 - 固态化学导论课程节选

This the first war that Nato has been in, as a war against a Nato member.

这是北约组织成立以来第一场针对其成员的战争。

普林斯顿公开课 - 国际座谈会课程节选

The first thing I have to do is bust that in half.

第一件事是将其减半。

麻省理工公开课 - 固态化学导论课程节选