She was hot and breathless from the exertion of cycling uphill.
她骑车上山累得全身发热，喘不过气来。
He needed to relax after the exertions of a busy day at work.
他忙碌工作了一天后需要休息。
the exertion of force/strength/authority
使用武力；使劲；行使权力
1.行使,运用
2.努力,尽力
1.great physical or mental effort
1.Myocardial ischemic pain due to coronary arteriosclerosis is usually exertion-related, at least initially.
由冠状动脉硬化引起的心肌缺血性疼痛通常与劳力有关，至少在初期是这样。
2.braveness . have no the heart be afraid , need the intelligence , mental exertion and experience and training.
勇敢。无所畏惧的心，需要智力、心力与历练。
3.It remains to be seen how much trouble and exertion that will involve.
这将耗费多大精力经历多少麻烦，我们拭目以待。
4.In the market democracy the objective of the voting process is not a man, but a man's achievements, the products of his exertion.
而在市场民主体制下，投票选举的目标并不是人，而是人所达致的成就，即他努力的产品。
5.Unfortunately if you don't exercise regularly, it can be hard to see the difference after just a few days of exertion.
如果你平时不锻炼的话，只锻炼几天是看不到多大的效果的。
6.by exertion of a very unusual degree of activity and courage, an entrance into the window, from the rod, might have been effected.
还有一点也很清楚，只有身手异常矫健和大胆，才可能从避雷针爬进窗里。
7.Physical over-exertion seems to be one of the main factors in prolonging illness, says Robinson, so it largely depends what your job is.
Robinson说，身体过分劳累似乎是病情发展的重要原因之一，很大程度上视乎你从事什么工作。
8.All this means the same level of exertion is likely to feel much harder at this time of day than later on.
所有的这些都意味着同样水平的发挥在凌晨要比以后的其它时间辛苦。
9.(especially of the face) reddened or suffused with or as if with blood from emotion or exertion.
（特别是指脸）发红，因为激动或者用力而充血或者好像充了血。
10.The fact remained that at the end of twenty years of exertion America was not at peace with itself.
然而，实际情况仍然是，经过二十年的努力后，美国本身也并不是没有意见分歧。