运动前准备不足
In the P.E. class we had the long-distance running. We had a warm-up before it. But I was lazy and didn't do it well. When I was running, I suddenly fell to the ground. I pulledthe muscles in the leg.
体育课上，我们要进行长跑。长跑前我们为此做准备活动，但是我很懒没有好好做。跑步时，我突然倒在地上。我腿上的肌肉拉伤了。