产品滞销;销量暴跌
the bottom drops / falls out (of sth)
(某行业)产品滞销;销量暴跌
people stop buying or using the products of a particular industry
The bottom has fallen out of the travel market.旅游市场出现了萧条局面。
释义来自《牛津高阶英汉双解词典》第 9 版