And he found that the middle member of the triad had an atomic mass that was midway between the atomic masses of the end members.

他发现三元组中间的元素,的原子质量,是位于两端的元素的原子质量,的中间。

麻省理工公开课 - 固态化学导论课程节选

So this was one of the things we changed in the midway through.

这就是实验过程中,我们进行的改变。

麻省理工公开课 - 媒体、教育、市场课程节选