You have a choice of coed or single-sex swimming exercise classes.

你可以选参加男女混合或是非混合的游泳练习课。

《柯林斯英汉双解大词典》

People under stress may become anxious or depressed, and as a result may eat too much or too little, have sleep difficulties or fail to exercise.

压力下的人可能会变得焦虑或抑郁，结果可能会吃得太多或太少，有睡眠困难或不能锻炼。

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He found that rats that exercise on a treadmill have raised levels of brain-derived neurotrophic factor coursing through their brains.

他发现，在跑步机上锻炼的老鼠，其大脑中流过的脑源性神经营养因子水平有所提高。

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Health experts advise people who have been physically inactive to have a complete physical exam before beginning a new exercise program.

VOA: special.2011.06.28

God created a good world, But humans in the exercise of their moral autonomy, They have the power to corrupt the good.

上帝创作了一个美好的世界，但人类掌控自己的道德，他们有能力腐蚀美好事物。

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And I think too, a really good exercise if you wanted to do is, if you have a dictionary,

我也认为，如果你想练习，如果你有字典的话，比较好的练习

有这样的困难 - SpeakingMax英语口语达人

Though options generally have a lengthy exercise period to allow the holders to see if the shares are increasing in value, upon termination of the employment relationship or as the option nears expiration, the holder may have to make a quick investment decision.

FORBES: Stock Options: A Strategic Weapon For Growth

And even if only a handful of the new interactions it throws up are real and useful, it will have been a worthwhile exercise.

ECONOMIST: Computers may give new life to old medicines

The State will have to exercise a guiding influence on the propensity to consume partly through its scheme of taxation, partly by fixing the rate of interest .

FORBES: Greece's Disgraceful Debt Default -- and Calls to "Euthanize" Bondholders