New Words：

exercise ['eksəsaiz]
n.运动；练习
v.锻炼；行使；训练；运用

Sample Sentences：

Swimming is good exercise.
If you don't get more exercise, you'll get fat.
Ten minutes are enough for you to do this exercise.
Exercises One are so simple that almost anyone can do them.

If you can only exercise once a week, that's better than nothing.
Exercise is the only way to get a flat stomach after having a baby.

exercise book 练习本

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