go through the floor
US /ɡoʊ θruː ðə flɔr/
UK /ɡoʊ θruː ðə flɔr/
1.
一落千丈, 跌入谷底
to fall to a very low level; to decrease very quickly
:
•
Sales of the product went through the floor after the scandal.
丑闻发生后，该产品的销量一落千丈。
•
House prices in the area have gone through the floor.
该地区的房价已经跌入谷底。