用作句词时：
1.运动, 锻炼
Moderate exercise will benefit you.
适当的锻炼对你有好处.
2.练习, 习题
Please do that exercise over again.
请重做那个练习.
3.演习, 操练
The captain set his soldiers various exercises.
上尉让他的士兵做各种操练.
4.使用, 应用
Voting is the exercise of a civil right.
选举是行使公民权利.
用作动词时：
锻炼, 训练; 练习
Every day I exercise before I go to sleep.
我每天睡觉前锻炼.
We should constantly exercise our muscles.
我们应当经常锻炼肌肉.
