1、Let's do some warming-up exercises first.
首先讓我們做一下熱身運動。

2、The runners have been in their lanes.They are doing warming-up exercises.
選手們已經上跑道了，他們在做準備活動。

3、Why is sufficient warming-up exercise necessary before the race?
為什么賽前要做好充分的準備活動？

4、Some people maintain that warming-up promotes flexiblity.
有人認為準備活動增進柔韌性，并防止肌肉受傷。

warming-up翻譯