We usually deal on a 20% trade discount basis with an additional quantity discount for orders over 1000 units.
我们通常给予20%的商业折扣,外加订货1000件以上的数量折扣。
They got on so well that Fred decided not to go to the lecture but to show the tourist around the university instead.
他们相处得很融洽,于是弗雷德决定不去听课,而带领这位游客到这所大学各处参观。