She began to research playground equipment and found many experts touting the benefits of 'back to nature' unstructured play.

VOA: standard.2010.06.25

It's crucial, as I say, and I'm going to be coming back to it, but it's just a point I want to make in passing about the nature of theory now.

这一点至关重要，而且我以后还会再次提到，但现在关于理论的本质我就谈到这里。

耶鲁公开课 - 文学理论导论课程节选

So you are saying that Nicola can go back into the state of nature if she wants to but she can't drive on Mass. Ave.?

你是说,只要妮可拉愿意，她可以回到自然状态,但她从此不能在麻省的路上开车了？

耶鲁公开课 - 公正课程节选

In other words, my belief-- and I am going to back that up with research today and for the next semester-- is human nature is fixed.

换言之，那是我相信的观点-,我会用三个研究加以证明，从今天开始,直到下个学期-,人类本性是固有的。

哈佛公开课 - 幸福课课程节选

Given that we're going to die, this fact seeps back in and poisons the nature of life or perhaps poisons the nature of the whole, life followed by death, so that on balance the whole thing's negative.

已知我们会死，这个事实渗透到并使毒害生命的本质,或者也许毒害所有事的本质，生后即是死，所以总的来说，所有的事都是消极的。

耶鲁公开课 - 死亡课程节选

If I then put it back into its original condition, lower the heat say, temperature back to body temperature and reduce the pH down to seven again, the molecules will re-nature.

假如我把烧杯的温度恢复到初始状态,降低温度,温度降低到体温,将pH值降低到七,这些分子会复性

耶鲁公开课 - 生物医学工程探索课程节选