filter

英 ['f?lt?] 美['f?lt?]

CET4TEM4GRE考研CET6核心詞匯IELTSTOEFL中低頻詞

復(fù)數(shù):?filters;第三人稱單數(shù):?filters;過去式:?filtered;過去分詞:?filtered;現(xiàn)在分詞:?filtering;

filter 過濾器

來自felt, 毛氈。用于過濾污物。

filter: filter: [14] Ultimately, filter is the same word as felt – and indeed that is what it first meant in English (‘They dwell all in tents made of black filter’, John Mandeville, Travels 1400). It comes via Old French filtre from medieval Latin filtrum, which was borrowed from prehistoric West Germanic *filtiz, source of English felt. The modern sense of filter did not develop until the 17th century; it came from the use of felt for removing impurities from liquid. The derivative infiltrate dates from the 18th century. (The homophonic philtre [16] is not related; it comes ultimately from Greek phílos ‘beloved’.)
=> felt, infiltrate
filter (n.): early 15c., "piece of felt through which liquid is strained," from Old French feutre "felt, felt hat, carpet" (Modern French filtre) and directly from Medieval Latin filtrum "felt" (used to strain impurities from liquid), from West Germanic *filtiz (see felt (n.)). Figurative use from c. 1600. As a pad of absorbent material attached to a cigarette, from 1908.
filter (v.): 1570s (transitive), from French filtrer or from Medieval Latin filtrare, from filtrum "felt" (see filter (n.)). The figurative sense is from 1830. Intransitive use from 1798. Related: Filtered; filtering.

1. Children should have glasses which filter out UV rays.: 兒童應(yīng)該戴上濾除紫外線的眼鏡。

2. She gathered loose soil and let it filter slowly through her fingers.: 她捧起疏松的泥土，任其緩緩地從指間漏下。

3. Change the filter cartridge as often as instructed by the manufacturer.: 按照生產(chǎn)廠家的使用說明，經(jīng)常更換過濾筒。