You bring iron ore from one part of the planet, carbon, limestone, you put it into this reactor and you ship this all over the world.

你得到钢铁从地球的一个地方，还有碳，石灰岩，将它们放入这个反应器,你将它运送到世界各地。

麻省理工公开课 - 固态化学导论课程节选

You'll find Christopher Reeve's star who played "The Man of Steel"

演《钢铁之躯》的克里斯托佛·里夫

街头邂逅明星 - SpeakingMax英语口语达人

You build a steel plant with a capital cost of several billion dollars.

你可以建立一个钢铁的地球,只要几十亿元的投入。

麻省理工公开课 - 固态化学导论课程节选

So you pick a better material like iron and steel, that makes a better bridge, we know that now because we have experience with bridges, but still your bridge might fail.

你选择了钢铁作为材料,来造了一座更好的桥,我们现在能够明晰这一点,是因为在造桥这件事上我们现在很有经验,但即使是我们现在造的桥也仍然会倒塌

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And steel is the most recycled material.

钢铁几乎是其中最可再生的材料。

麻省理工公开课 - 固态化学导论课程节选