| 单词 |
air-hole |
| 释义 |
ˈair-hole [air- 7.] 1. A hole or passage to admit air; spec. A hole that forms in the ice in rapid rivers over the main current, for which it is a breathing-place.
1766Smollett Trav. I. xvi. 264 He said that there were air-holes at certain distances (and indeed I saw one of these). 1876W. Boyd in Bartlett Dict. Amer., The ice on the St. Lawrence at Montreal never becomes stationary for the winter until one or more air-holes have formed in it in that neighbourhood. 1883C. Holder in Harper's Mag. Jan. 190/1 The air-holes open and shut at the will of the insect. 2. ‘The cavities in a metal casting—produced by the escape of air through the liquid metal.’ Ure Dict. Arts.
1813Southey Nelson vii. 249 [The guns] were probably originally faulty, for the fragments were full of little air-holes. |

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