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。
Of course, we should arrest him, but as he has a good record, we shall let him off this time.'
当然,我们应该逮捕它,但由于它一贯表现很好,这次我们饶了它。