Sit on an exercise ball and do one minute of ab curls.
坐健身球上，收腹1分钟。
Bouncing on an exercise ball or birthing ball while you hold her.
抱着宝宝在健身球或分娩球上轻轻弹跳。
You can get some exercise by knocking a ball about a field with a friend.
和一个朋友在场上打打球会使你得到锻炼的。
There is a lot we can do exercise, such as running, swimming and ball games.
有很多我们可以作的锻炼，比如跑步，游泳和球类运动。
In my free time, I'll go on to take regular exercise, such as swimming, running and various ball game.
在我的空闲时间，我将继续进行有规律的锻炼。例如，游泳，跑步，和各种各样的球类运动。
I want a ball-pen and some exercise books.
请给我圆珠笔和练习本。
I want a ball-pen and some exercise books.
请给我圆珠笔和练习本。
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