"Basically,it's an underwater balloon. You've got two parts to it: You've got the balloon here - which is this long cylindrical object - and that's filled with a lighter-than-water substance, which is aviation gasoline."

VOA: standard.2010.06.21

According to the dualist, the mind is this immaterial substance and we could call it by different names.

根据二元论,心灵是非物质的实体,我们可以用不同的名字称呼它

耶鲁公开课 - 死亡课程节选

And, in fact there's a technique of analysis used today that's called Rutherford back scattering where people actually saw that this is a means of identifying the substance, the sample.

事实上这是现在用的一种分析技术,称作卢瑟福背散射,就是人们实际上看到的那样,这是鉴别物质样品的一种方法。

麻省理工公开课 - 固态化学导论课程节选

"There is a sense that when the political leaders arrive in the next few days, that they will be able to overcome some of the stumbling blocks, because I believe the leaders will be able to really grab this issue by the scruff of the neck and get down to the substance and bridge the remaining gaps,".

VOA: standard.2009.12.17

As I said, it's a particularly hazardous substance, this is worked with in fume hoods.

就像我说过的，这是特别有害的物质，在通风柜中才能用。

麻省理工公开课 - 化学原理课程节选

This would an example of a substance that inhibits the action of a natural ligand and they can inhibit in a variety of ways.

这类物质能够以多种方式,抑制天然配体的作用

耶鲁公开课 - 生物医学工程探索课程节选

Now that's pretty far fetched and not many people would say that a pop tart should be a controlled substance and regulated by government, but there are some very interesting chemical properties associated with foods like this that trigger things going on in the brain that affect us in a very big way.

这多少有点牵强,而且也没有很多人会认为,这种果酱馅饼应归为管制品,并受到政府监管,但有趣的是这种食品,确实有一些特别的化学特性,它会作用于大脑并会对我们产生大的影响

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选