/keɪv ||; kev/noun
[C] a large hole in the side of a cliff or hill, or under the ground 山洞;地洞;洞穴:
When it started to rain, we ran to shelter in a cave.雨下起来的时候,我们都跑进山洞里避雨。
cave²
/keɪv ||; kev/verbcave in
1 to fall in 塌落;坍塌;内陷:
The roof of the tunnel had caved in and we could go no further.隧道顶部已塌陷,我们无法再前进。
2 to suddenly stop arguing or being against sth 屈服;妥协:
He finally caved in and agreed to the plan.他终于软化,同意了这个计划。