headlightn.
英 'hedlaɪt | 美 'hɛdlaɪt
中文n. 汽车等的前灯；船上的桅灯；矿工和医生用的帽灯
词根词源
headlight (n.)large lamp and reflector carried in front to illuminate at night, 1861, originally of ships and locomotives, from head (n.) + light (n.). Related: Headlights, which, as slang for "a woman\\'s breasts," is from 1940s.
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