filterWiktionary 原文中文来自 ECDICTn.滤波器，过滤器，滤光器，过滤嘴，去尘器vt.过滤，渗透，走漏vi.滤过，渗入演变路径（由近及远）英语继承自 ←中古英语 filtre源自 ←中世纪拉丁语 filtrum源自 ←法兰克语 *filtir源自 ←原始西日耳曼语 *felt原始词根原始印欧语 *pel-词源说明From Middle English filtre, from Medieval Latin filtrum (compare also Old French feutre (“felt; filter”)), from Frankish *filtir, from Proto-West Germanic *felt. See felt. Doublet of phin.释义（英文）名词 NounA device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.Electronics or software