商品品質決定交易本質上的價值，因此它是最重要的交易因素之一。貿易上的品質決定方法有：憑樣品買賣，憑標準買賣，憑規(guī)格買賣等。下面我們來看看有關品質的表達法。
品質優(yōu)良：quality is excellent/ superior/ very good/ fine/ best/ high/ wonderful/ supreme/ attractive
品質低劣：quality is bad/ inferior/ not good/ poor/ imperfect/ defective/ faulty/ second-rate/ lower/ unsatisfactory
品質保證：retain the good quality; keep up to the standard quality; obtain a good quality; attain the best quality; secure an excellent quality
物品以達標準品質：An article is up to the standard quality; An article is of the same quality as the standard; An article is equal to the standard quality; An article is the same as the standard quality
物品在標準以下：An article is below the standard
物品在標準以上：An article is above the standard
物品和樣品一致：An article is up to the sample; An article corresponds with the sample; An article is equal to the sample.
average quality 標準品質
We would like to buy 500 tons of average quality corn.
customary quality 一般品質
The quality of the goods shipped is customary quality.
best quality, prime quality, first-rate quality 最佳品質
The goods supplied shall only be those of best quality.
quality inspection certificate 品質檢驗證書
Please be sure to attach a quality inspection certificate.
difference in quality 品質上的差異
There is a big difference in quality between the trial order and the order of this time.
guarantee of quality 品質保證
We request a guarantee of quality for a period of one year on all the goods you sell.
sacrifice quality 降低品質
If you sacrifice the quality and deliver goods of imperfect quality to us, we will refuse to accept them.
（來源：大耳朵英語 英語點津 Annabel 編輯）
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