今日短语：
warm up

做暖身运动

例句：
A: If you don't warm up before exercising, you will injure yourself.
若你在运动前不先暖身，你会伤到自己。
B: No wonder my legs still hurt so bad from last week's workout.
难怪从上星期健身之后，我的腿到现在都还痛得要死。