adj.底层的,最低的;
例句:
I will knock another $ 5.00 off this already rock-bottom price.
你就从这已经杀得不能再低的价钱里再扣5元吧.
No , I'm sorry. This is our rock-bottom price.
很抱歉, 这是我们的最低价格.
What they do offer is a good product at a rock-bottom price.
他们提供的确实是物美价廉的产品。