| 单词 | boom |
| 释义 | Word Frequency boom 1(buːm) verb 1. to make a deep prolonged resonant sound, as of thunder or artillery fire 2. to prosper or cause to prosper vigorously and rapidly business boomed noun 3. a deep prolonged resonant sound the boom of the sea 4. the cry of certain animals, esp the bittern 5. a period of high economic growth characterized by rising wages, profits, and prices, full employment, and high levels of investment, trade, and other economic activity Compare depression (sense 5)6. any similar period of high activity 7. the activity itself a baby boom Word origin C15: perhaps from Dutch bommen, of imitative originWord Frequency boom 2(buːm) noun 1. nautical a spar to which a sail is fastened to control its position relative to the wind 2. a beam or spar pivoting at the foot of the mast of a derrick, controlling the distance from the mast at which a load is lifted or lowered 3. a pole, usually extensible, carrying an overhead microphone and projected over a film or television set 4. a. a barrier across a waterway, usually consisting of a chain of connected floating logs, to confine free-floating logs, protect a harbour from attack, etc b. the area so barred off Word origin C16: from Dutch boom tree, beam |
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