cave

noun

1. 山洞；洞穴
   a large hole in the side of a hill or under the ground
   1. the mouth (= the entrance) of the cave
      洞口
   2. a cave-dweller (= a person who lives in a cave )
      穴居人

verb

verb

1. N-COUNT 山洞;洞穴
   A cave is a large hole in the side of a cliff or hill, or one that is under the ground.
   1. ...a cave more than 1,000 feet deep.
      1,000多英尺深的山洞

1. The cave walls were beaded with moisture.
   这个洞穴壁上布满了水珠。
2. The limestone is sufficiently fissured for tree roots to have breached the roof of the cave
   石灰岩上有许多缝隙，故而树根能从岩洞顶部长出来。
3. I had a nervous breakdown, everything just seemed to cave in on top of me.
   我曾经有过一次精神崩溃，好像天塌了一样。
4. They tried digging in a patch just below the cave
   他们试着在洞穴正下方的一块地上挖掘。
5. But in some respects cave dwellers were far cleverer than us.
   但是在某些方面穴居人要比我们聪明得多。
6. King Arthur hid his treasures here and Merlin enchanted the cave so that nobody should ever find them.
   亚瑟王将他的财宝藏在这里，墨林对洞穴施了魔法，这样永远不会有人找到那些财宝。
7. Heedless of time or any other consideration, they began to search the underwater cave
   他们顾不上考虑时间或任何其他因素就开始寻找水下洞穴。
8. The entrance to the cave was infilled by the landowner
   山洞的入口被地产的主人给堵上了。
9. Another flash of lightning lit up the cave.
   又一道闪电照亮了山洞。
10. Both boats purred out of the cave mouth and into open water
    两艘船隆隆地从洞口开出，进入了开阔的水域。
11. The cave roof collapsed.
    洞顶坍塌了。
12. Most of the mouth of the cave was submerged in the lake.
    洞口大半都淹没在湖里。
13. The force of the water washed him back into the cave.
    大水把他冲回到洞里。
14. The cave fell in.
    山洞崩塌了。
15. The earthquake made the roadbed cave in.
    地震后路基沉陷了。
16. Going into that deep, pitch-dark cave was really frightening.
    山洞又黑又深，进去可真吓人。
17. As a result of continuous water erosion, in the course of time a huge cave was formed.
    由于水的不断侵蚀，日久天长就形成了一个大溶洞。
18. The roof of the cave dropped in on the miners, trapping them.
    窑洞的顶部坍了下来，砸在矿工身上。
19. It's frighteningly dark inside the cave.
    山洞里黑得怕人。
20. It's all darkness in the cave.
    山洞里一片黑暗。
21. What is the depth of the cave?
    这山洞有多深？
22. There are all kinds of strange stone formations in the seven-star cave.
    七星岩里的石头千奇百怪。
23. The children found a cave in the side of the mountain.
    孩子们在山坡上发现了一个岩洞。
24. The children shouted loudly in the cave so they could hear the echoes.
    孩子们在山洞里高声喊叫，想听听回声。
25. They picked a cave for their night camp.
    他们选了一个山洞作为过夜的营地。
26. There is only a pinpoint of light in the cave.
    山洞中只能见到一丝光线。
27. The cave of the hill looks ghastly in its depth.
    山洞深处阴森森的。
28. It's chilly inside the cave.
    山洞里冷森森的。
29. The roof is dangerous and could cave in at any time.
    屋顶很危险，任何时候都可能坍塌。
30. The scene in the Shihua Cave is unsurpassably magnificent.
    石花洞里的景象真是太奇瑰了！

  hole cave cavity grotto【导航词义：洞，穴】

  hole n. 洞，穴

〔辨析〕普通用词，泛指固体物中的空间或某物可穿过的空间。

  cave n. 洞穴

〔辨析〕指较大的天然洞窟，如山洞、岩洞等，也可指人造的窑洞。

  cavity n. 〈正式〉洞，空穴，腔

〔辨析〕比 hole 正式，指实体内或表面的空洞或空腔。

  grotto n. 洞穴，石室

〔辨析〕指较小的、吸引人的洞穴、岩穴、石窟等，可以是天然的，也可以是人工开凿的。

cave in (on sb/sth)

1. 塌落；塌陷；坍塌
   to fall down and towards the centre
   1. the mouth (= the entrance) of the cave
      洞口
   2. a cave-dweller (= a person who lives in a cave )
      穴居人

cave in (to sth)

1. 让步；屈服；屈从
   to finally do what sb wants after you have been strongly opposing them

noun

1. a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea

verb

1. explore natural caves

   Synonym:    spelunk

2. hollow out as if making a cave or opening
   1. The river was caving the banks

   Synonym:    undermine