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。
If there is one -- which I take leave to doubt -- then it is older people who create it, not the young themselves.
如果这个问题存在的话 -- 请允许我对此持怀疑态度 -- 那么,这个问题是由老年人而不是青年人造成的。