Some people,for example, do this if they exercise hard during a heat wave.

VOA: special.2010.07.27

it was a small seminar-- I had groups of students proposing two novels actually for the end of the syllabus, and the exercise gets you to think very hard about what you think this period is all about.

是以小组研讨课的方式进行-,几组学生提出两本小说,作为教学大纲上最后一本读物，这样做的练习的目的是,让你去思考这个时期的意义。

耶鲁公开课 - 1945年后的美国小说课程节选

This is a tough exercise especially for guys, but please bear with me.

特别对男生来说是个困难练习，但请忍耐。

哈佛公开课 - 幸福课课程节选

This makes it a better choice of exercise for older adults.

VOA: special.2010.06.08

And if you all survive this exercise you'll be better for it.

如果看到对比后，还能够挺过来,说明你离坚强又近了一步。

耶鲁公开课 - 心理学导论课程节选

And we work with parents and community residents to really understand why this is so important, and for them to hopefully demand these healthy foods and places to exercise in their own communities."

VOA: standard.2010.06.23

We're not asking you to change anything; in fact it's best for this particular exercise to eat as you typically would so you can get a sense of what an average day would be like for you.

我们不是要求你去改变什么,事实上,对于这个作业来说,保持以前的饮食习惯是最好的,以便了解自己平时的饮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选