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。
later, we shall undergo a progressive loss of our vigour and resistance which, though imperceptible at first,
再迟一些,我们就要经历生命力和抵抗力逐步衰退的过程。虽然这个过程起初难以觉察,