n. 练习；运动，训练；运用；典礼
vi. 锻炼，训练，练习；
vt. 锻炼（身体某部位）；使焦虑，使忧虑；实行，发挥（作用）；运用
1. exercise作可数名词用，表示“练习，习题，体操，功课，操练”等，常用复数。
I'm doing my exercises. 我在做练习/功课。
Doing morning exercises is helpful to our health. 做早操对我们的健康是有益的。
You should do more spelling exercises. 你应该做更多的拼写练习。
2.作不可数名词用，表示“锻炼，运动”。
You are weak because of the lack of exercise. 你身体弱是因为缺少锻炼。
Take more exercise, and you will be healthy. 多多锻炼，你会健康的。
1. His exercise books were full of well deserved red ticks.
他的练习本上尽是些红钩钩，都是他应得的。
2. Swimming is probably the best form of exercise you can get.
游泳或许是现有的最佳锻炼方式。
3. A bit of exercise will help lift his spirits.
进行一点儿体育锻炼能帮助他改善情绪。
4. Lack of exercise can lead to feelings of depression and exhaustion.
缺乏锻炼会导致抑郁和疲劳。
5. Other amenities, less commonly available, include a library and exercise room.
还有一些不太常有的设施，包括图书馆和健身房。
6. Television broadcasters were warned to exercise caution over depicting scenes of violence.
电视台受到警告，要求对暴力场面的描绘采取谨慎态度。