井壁坍塌的英文：
slump in

slump是什么意思：
v. 下跌；衰落；下降；（使）倒下
n. 骤降，猛跌，锐减；萧条期；衰退

She slumped into a chair.
她轰然倒在了椅子上。

Gill was dwelling on the consequences of the slump.
吉尔一直在考虑这衰退的后果。

Net profits slumped by 41%.
净利润暴跌了41%。

The slump in global manufacturing seems to be easing.
全球制造业的衰退似乎也正在减缓。

If the slump continues, more men will be stood off.
如果经济萧条持续下去，将有更多的人被解雇。