nightfallWiktionary 原文中文来自 ECDICTn.傍晚，黄昏，日暮构词拆分night词根/词干+fall词根/词干词源说明From night + fall. Cf. dewfall.释义（英文）名词 NounThe close of the day; the coming of night.Nocturnal emission.词族派生词（1）night-falling相关词（2）darkfallsmokefall