cave in
塌落；认输
同义词
参考例子
1.The roof of the working face caved in suddenly, several miners were trapped.
工作面的顶板突然塌落，数名矿工被困在工作面内。
2.When did the ceiling cave in ?
天花板什么时候“塌落”的?
3.He explains that sewers would clog, underground streams would flood subway corridors, and soils under roads would erode and cave in.
他称，下水道会阻塞，地下水灌满地铁通道，公路下的土石逐渐腐蚀，造成道路塌方。
英文解释
n.
1.the sudden collapse of something into a hollow beneath it
2.break down, literally or metaphorically
网络释义
cave in
(使)下陷，坍塌; 塌落; 下陷; （使）下陷，坍塌;
cave-in
陷落; 塌方; 坍陷,落; 坍陷,落盘;
cave-in collapse
坍塌;
cave-in accident
塌陷事故;
cave-in possibility
塌方[失败]可能性;