我们如何能得到没有杂质的混凝土？

How can we obtain the concrete free of these impurities?

youdao

等着没有杂质的世界出现在短暂的冬天。

Waiting for the emergence of a world without impurities in the short-term winter.

youdao

大学的友谊是没有杂质的。

The campus love is also pure.

youdao

I think it was in French, so it wasn't really hitting all the scientific community of the time in any major way.

我印象中是发表在一个法语杂质上，所以它并没有在当时的科学界的,主流领域中取得反响。

麻省理工公开课 - 化学原理课程节选