有些公司已采取了措施，不让妇女从事可能接触有害物质的工作，以便保护未出生的孩子。

Some companies have already taken steps (taken measures) to protect the unborn child by excluding women from jobs where they might be exposed to hazardous substances.

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在沥青沥青铀矿矿中提炼和测量出各种各样的物质的工作是非常繁重、肮脏和单调乏味的，但是玛丽于1898年发现了两个新的放射性元素：其中的一个，她根据祖国波兰的名称，称此元素为钋，她命名第二个所发现的元素为镭。

It was heavy, dirty, and tedious work to separate and measure the various substances, but Marie was able to discover two in 1898. She named one substance polonium, after her motherland of Poland.

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作为工作的一部分，她对环境中的有毒物质进行了实地研究。这些物质通常来源于大型工业污染源附近的少数民族社区。

As part of her job, she conducted field research on toxic substances in the environment, often in minority communities located near large industrial polluters.

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How to go from one reference point to the other with this property. This property, f which we're going to call f.

这两个参考点插值,得到不同温度时工作物质的特性，我们把这一特性记做。

麻省理工公开课 - 热力学与动力学课程节选

And where we where at the start of the 20th Century in the late 1890's is that we were at a place where there was great confidence in our understanding of the universe, and our understanding of how all matter worked.

0世纪开始讲起,在19世纪的九十年代,人们对于自己,对自然的理解,对自然所有物质,如何工作的理解十分自信。

麻省理工公开课 - 化学原理课程节选

That's pretty straightforward.

现在我们的工作物质是气体。

麻省理工公开课 - 热力学与动力学课程节选