我觉得一楼比较正确
这是来自百度词典的解释
exercise
KK: []
DJ: []
n.
1. 运动,锻炼[C][U]
Swimming is one of the healthiest forms of exercise.
游泳是最有益于健康的运动方式之一。
2. 练习;习题[C]
Do the vocabulary exercise at the end of the chapter.
做这一章末尾的词汇练习。
3. 军演习;操练[C]
4. (特定的)活动;行动[S][(+in)]
5. (权力,权利等的)行使,运用[S][(+of)]
The government must be careful in its exercise of power.
政府在行使其权力时必须小心谨慎。
6. 美仪式,典礼[P]
Graduation exercises are usually held in June.
毕业典礼通常在六月举行。
7. 礼拜;宗教仪式
vt.
1. 锻炼;操练;练习
2. 运用,行使
The King cannot exercise much political power.
这位国王能行使的政治权力并不多。
3. 使忙碌;使担忧;使惊恐
vi.
1. 练习;运动
I think you should exercise more.
我认为你应该多运动运动。