| 单词 | boom |
| 释义 | boom1 /bum; bum/ n 1 long spar used to keep the bottom of a sail stretched out, 帆之下桁。 → the illus at barque. 参看 barque 之插图。 2 derrick pole fastened to a derrick crane, used for (un-)loading cargo. (D上装卸货物起重用的) 吊杆。 3 heavy chain, mass of floating logs, etc held in position across a river or harbour entrance, eg as a defence in time of war, or to prevent logs from floating away. 横拦于河中或港口之大织錬或一批浮木 (于战时御敌用，或用以阻拦圆木漂走); 筏堰。 4 long, movable arm for a microphone. (挂麦克风用) 活动长杆 (臂) 。 |
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