These won't be graded, you don't have to turn them in, it's just to give you some extra practice if you want while you're studying for the exam.

这些题目不会记分，你们也不需要交上来，只是如果你需要的话，这可以让你,在准备考试的过程中得到更多的训练。

麻省理工公开课 - 化学原理课程节选

But in the real world when dealing with humans, but even when dealing with animals, we don't actually always use primary reinforcers or negative reinforcers.

但当我们在现实中训练人类，甚至是训练动物时，我们实际上并不总是用到初级强化物,或是负强化物。

耶鲁公开课 - 心理学导论课程节选

A lot of the examples that we're going to give you in terms of trying out your Lewis structures will be molecule that are used in organic synthesis, or maybe they're molecules that react in interesting ways with biomolecules in your body or proteins in your body.

很多我们将要用来,训练路易斯结构的例子,都是在有机合成中用到的分子，也有可能是那些在你体内的生物分子,或者蛋白质中发生有趣反应的分子。

麻省理工公开课 - 化学原理课程节选

Yeats was trained in the occult disciplines of Theosophy and Gnosticism. Those traditions merge in his early work with European symbolism, and also with Irish cultural nationalism.

叶芝曾受到通神论和诺斯替教,神秘主义教条的训练，这些传统,在他早期作品中与欧洲象征主义，和爱尔兰文化民族主义结合。

耶鲁公开课 - 现代诗歌课程节选

The history of the military in the United States and other countries includes a lot of attempts to get animals like pigeons or dolphins to do interesting and deadly things through various training.

各国在其军事史中,都有试图通过训练鸽子海豚等动物,去完成各种高难而致命任务的尝试。

耶鲁公开课 - 心理学导论课程节选