"slump" in Chinese (Simplified)
下跌低谷衰退
Definition
“slump” 指价格、活动或表现的突然或明显下跌，也可以指因疲劳而突然沉坐或倒下。
Usage Notes (Chinese (Simplified))
常用于描述经济下跌（如“经济slump”），也可指人的状态低迷或突然坐下。用于形容姿态时是口语化表达。整体比collapse（完全倒下）和decline（缓慢下降）更突然但不一定极端。
Examples
There's been a slump in housing prices recently.
最近房价出现了**下跌**。
Sales have slumped this year.
今年销售额**下跌**了。
He sat and slumped in his chair, looking tired.
他坐下，**无力地瘫倒**在椅子上，看起来很累。
The team is in a slump and keeps losing games.
这支球队正处于**低谷**，不断输球。
After the meeting, I just slumped onto the sofa and didn't move for an hour.
开完会后，我直接**瘫倒**在沙发上一小时都没动。
Whenever I'm in a slump, I try to take a walk to clear my mind.
每当我处于**低谷**时，我会去散步让自己冷静下来。