This is a quality product.
这是一种高质量的产品。

Those overcoats are of good quality and nice colour.
这批大衣质量高、成色好。

Our quartz technique is well known in the world, and we believe our watches are of fine quality.
我们的石英技术世界闻名，相信我们生产的手表具有高质量。

Our price is a little bit higher, but the quality of our products is better.
虽然价格偏高，但我们的产品质量很好。

Your goods are superior in quality compared with those of other manufacturers.
和其他厂商相比，贵方产品质量上乘。

The equipment are of good quality and very useful.
这些器械质量好，用处大。

Our products are very good in quality, and the price is low.
我们的产品质高价低。

We have received the goods you send us, the quality is excellent.
我们已经收到贵处来的货，质量很好。

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。

We hope that you'll pay more attention to the quality of your goods in the future.
希望贵方将来多注意产品的质量问题。

The workings of these machines are inaccurate.
这批机器运行不准。

Upon arrival, we found the shipment of wool was of poor quality.
货到后，我们发现羊毛的质量较差。

The quality of the fertilizer is inferior to that stipulated in the contract.
化肥质量次于合同中规定的。

The quality of this article cannot qualify for first-class.
这批商品的质量不够一等品。

If you find the quality of our products unsatisfactory, we're prepared to accept return of the rejected material within a week.
如果贵方对产品质量不满意，我们将在一星期内接受退货。

More than 300 watches are not up to standard.
有300多块手表不合质量标准。
　
bad quality 劣质

low quality 低质量

inferior quality 次质量

to be responsible for 对...负责

inaccurate 不精确的

poor quality 质量较差

to be inferior to 次于...

first-class 一等品

unsatisfactory 不满意的

good quality 好质量

fine quality 优质

better quality 较好质量

high quality 高质量

fair quality 尚好的质量

sound quality 完好的质量

best quality 最好的质量

superior quality 优等的质量

choice quality或selected quality 精选的质量

prime quality 或 tip-top quality 第一流的质量

first-class quality 或 first-rate quality 头等的质量

above the average quality 一般水平以上的质量

below the average quality 一般水平以下的质量