英语语法分析

He is a metallurgist.

他是冶金学家。

But the metallurgist USES the word in relation to a wide variety of processes.

但是冶金学家用这个词来表述很多过程。

The metallurgist has made iron into dozens of different metals or alloy steels, as we call them.

冶金学家已用铁炼成了许多不同的金属，即我们所称呼的合金钢。