吃透英语课本，提升在校竞争力
n. 猛跌；衰退；萧条期
v. 急剧下降；暴跌；重重地坐下（或倒下）
现在分词：slumping
第三人称单数：slumps
过去式：slumped
过去分词：slumped
复数：slumps
Sales slumped by 20% last year.
去年销售额骤减 20%。
The council's land is now worth much less than originally hoped because of a slump in property prices.
由于地产价格的暴跌，委员会的土地目前大不如原来所希望的那么值钱了。
The economy is in a slump.
经济处于低迷状态。
slump test
稠度试验，坍落试验；流动度试验；重陷试验
economic slump
经济衰退
vi.下降，衰落；倒下
decline
go down
n.衰退；[金融]暴跌；消沉
recession
downturn
vt.使降低；使衰落；使倒下
drop
