standard quality 标准质量
usual quality 通常的质量
popular quality 大众化的质量
uniform quality 一律的质量
average quality 平均质量
fair average quality (f.a.q.)大路货
We are responsible to replace the defective ones.
我们保换质量不合格的产品。
It‘s really something wrong with the quality of this consignment of bicycles.
这批自行车的质量确实有问题。
I regret this quality problem.
对质量问题我深表遗憾。