| 正面 | 12112.precipitation 英 [prɪ,sɪpɪ'teɪʃ(ə)n]美 [prɪ'sɪpə'teʃən]     |
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| 背面 |      释义： 1. pre- "before, forth" + cipit- + -ation.2. 本义为：头向前、朝前倾斜。很显然这会造成不稳定，进而导致摔倒、摔下、坠落，由此引申为：猛然摔下，坠落，又由此引申为沉淀。以及由头向前而表示的那种不沉稳之意，进而引申为：轻率、鲁莽、急促。n. [化学] 沉淀，[化学] 沉淀物；冰雹；坠落；鲁莽 例句： 1. an increase in annual precipitation年降水量的增加 precipitation 降水，沉淀，沉积来自precipitate,降水，降雪，沉积。 precipitation (n.)late 15c., "a casting down" (of the evil angels from heaven), also, in alchemy "separation of a solid substance from a solution," from Middle French precipitation (15c.) and directly from Latin praecipitationem (nominative praecipitatio) "act or fact of falling headlong, haste," noun of action from past participle stem of praecipitare "fall, be hasty," from praeceps "steep" (see precipice). Meaning "sudden haste" is c. 1500. Meaning "act of falling from a height" is attested from 1610s. Meteorological sense of "rain, snow, dew, etc." is from 1670s." |