cave

使凹陷，使塌落；在…挖洞穴英释vvto hollow out

洞穴，窑洞英释nna large natural hole in the side of a cliff or hill, or under the ground

1 cave in,塌落；认输

2 karst cave,岩溶洞

3 cave dwelling,窑洞

4 limestone cave,灰岩洞，石灰岩洞

5 reed flute cave,芦笛岩

6 rock cave,岩洞

1 the entrance to a cave.洞穴的入口