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。
When I asked him what he was doing, he smiled guiltily and then put the parcel on the desk.
当我问他正干什么时,他内疚地笑了,然后把那个大包拿到了桌上。