Seven percent would be possible for orders for, say, 500 or more.
订购500台或500台以上都不得有可能给予7%的折扣。
It is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures, not content with only three meals a day.
它们一年中消灭了多少昆虫,我们简直无法猜测,它们是吃不饱的动物,不满意一日三餐。