美洲的冶金学发展非常晚，而且发展有限。与之不同的是，非洲人在更早的时候就有了铁。

Unlike in the Americas, where metallurgy was a very late and limited development, Africans had iron from a relatively early date.

youdao

如果没有免疫学、生物化学、化学工程、统计学和冶金学等等领域无数的进步，我不会是现在这样，事实上我可能根本不存在了。

Without innumerable advances in immunology, biochemistry, chemical engineering, statistics and metallurgy, to name but a few, I wouldn't be where I am now - in fact I wouldn't be at all.

youdao

一个能英语说得很好的冶金学研究生解释说，他的研究可比不上在伦敦或洛杉矶的同学，因为制度不容许。

A postgraduate metallurgy student who spoke good English explained that he could not compare his research with a fellow student in say, London or Los Angeles, because the system would not let him.

youdao

You might say, well what's the person who studied chemical metallurgy doing teaching chemistry here? Well, after my Ph.D., MIT I came here as a postdoctoral fellow in 1977.

你们可能会问，这个学习,化学冶金学的人怎么会在这教,化学呢，好吧，在我拿到博士学位后，1977年我作为一名博士后来到了。

麻省理工公开课 - 固态化学导论课程节选