| 釋義 |
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. 參看 barque 之插圖。 2 derrick pole fastened to a derrick crane, used for (un-)loading cargo. (D上裝卸貨物起重用的) 吊桿。 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. 橫攔于河中或港口之大織錬或一批浮木 (于戰(zhàn)時(shí)御敵用，或用以阻攔圓木漂走); 筏堰。 4 long, movable arm for a microphone. (掛麥克風(fēng)用) 活動(dòng)長(zhǎng)桿 (臂) 。 |