First you must find out the clause of the quality problems and furnish sufficient evidence.
首先你的查查有关质量问题的条款,并提供足够的证据。
A moment later, the Class 4 runner fell and hurt his leg, but he quickly got up and went on running.
过了一会儿,4班的运动员摔倒了,伤了腿,但是他很快爬起来,继续往前跑。