1·It is a kind of warm up.
这是一种热身方式。
2·Let's do warm up and stretch exercises.
让我们一起做热身和伸展运动吧。
3·You must warm up before you play football.
踢足球之前必须要热身。
4·It's important to warm up before exercise.
在锻炼前做热身活动是很重要的。
5·That's right, kids, you have to warm up often.
就是这样,孩子们,要经常热身。