The competition includes acetaminophen, the active substance in products like Tylenol.

VOA: special.2010.12.14

Just like our substance doesn't care where the gas is. It's kind of universal.

与压强无关的参考点,那就再好不过了。

麻省理工公开课 - 热力学与动力学课程节选

We've talked about killing a virus by cross-linking it, for example, to make a substance that looks like a vaccine-- looks like a virus but can't replicate.

例如,我们谈论过,通过蛋白交联来杀死病毒,以便制造出一种类似疫苗,应该是类似病毒但却无法进行复制的物质

耶鲁公开课 - 生物医学工程探索课程节选

How can we prevent problems like depression or substance abuse or schizophrenia in young people who are genetically vulnerable or who live in worlds ? that nurture these problems?

怎样才能预防像抑郁症这样的心理问题,或年轻人中常出现的药物滥用或精神分裂症,谁天生敏感脆弱，谁又是,制造这些问题的人？

哈佛公开课 - 幸福课课程节选

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