我以三元的价格卖这支钢笔。

I sell my pen for three yuan.

youdao

一个月饼的成本最多只需要两元或者三元。

A moon cake costs only two or three Yuan at most.

youdao

并且我们已经做过两次了，一次是关于二元函数的，另一次关于三元函数的。

And we have seen them twice. We have seen them once for functions of two variables, once for functions of three variables.

youdao

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

And he did it for other triads.

他这样做还为了其他的三元组。

麻省理工公开课 - 固态化学导论课程节选