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。
for their house, which had sound foundations, would have stood stoutly even if it had been almost submerged.
因为他们的房子地基牢固,即使洪水几乎灭顶也不会倒塌。