ph.
1. The enemy had to cave in and surrender.
敌人只好屈服投降。
2. The floods caved in that dike.
洪水冲坍了那座堤坝。
3. When did the ceiling cave in ?
天花板什么时候塌落的？
1. (使)下陷,坍塌：catch up 赶上;打断...的话 | cave in (使)下陷,坍塌 | change one's mind 改变主意
2. 塌落：caution sign 警告标志 | cave in 塌落 | cavern 洞穴
3. 陷落：01 Cave In 陷落 | 02 The Bird And The Worm 鸟与虫 | 03 Hello Seattle 哈啰西雅图
4. 沦陷：01. Cave In 沦陷 | 02. The Bird And The Worm飞鸟与爬虫 | 03. Hello Seattle 你好 西雅图
1. (屋顶、天花板等)塌陷，凹陷
If something such as a roof or a ceiling caves in, it collapses inwards.
e.g. Part of the roof has caved in...
屋顶有一部分塌了下来。
e.g. The wall caved in to reveal a blocked-up Victorian fireplace...
墙坍塌了，露出砌在里面的维多利亚时代的壁炉。
2. (尤指迫于压力)突然停止争辩，让步，屈服
If you cave in, you suddenly stop arguing or resisting, especially when people put pressure on you to stop.
e.g. After a ruinous strike, the union caved in...
一场破坏性的罢工之后，工会突然服软了。
e.g. The Prime Minister has caved in to backbench pressure...
首相迫于后座议员们的压力让步了。