precipitate

英 [pr?'s?p?te?t] 美[pr?'s?p?tet]

n. [化學(xué)] 沉淀物
vt. 使沉淀；促成；猛拋；使陷入
vi. [化學(xué)] 沉淀；猛地落下；冷凝成為雨或雪等
adj. 突如其來(lái)的；猛地落下的；急促的

CET6+TEM8IELTSGRETOEFL低頻詞擴(kuò)展詞匯

詞態(tài)變化

第三人稱單數(shù):?precipitates;過(guò)去式:?precipitated;過(guò)去分詞:?precipitated;現(xiàn)在分詞:?precipitating;副詞:?precipitately;

助記提示

1. pre- "before, forth" + cipit- + -ate.
2. 本義為：頭向前、朝前傾斜。很顯然這會(huì)造成不穩(wěn)定，進(jìn)而導(dǎo)致摔倒、摔下、墜落，由此引申為：猛然摔下，墜落，又由此引申為沉淀。以及由頭向前而表示的那種不沉穩(wěn)之意，進(jìn)而引申為：輕率、魯莽、急促。

中文詞源

precipitate 一頭栽下，沉淀，凝結(jié)，降水，降雪

pre-,在前，-cip,頭，詞源同cap,captain,-ate,使。即使頭在前，一頭栽下，后用于氣象術(shù)語(yǔ)，降水，降雪，引申物理術(shù)語(yǔ)沉淀，沉積，積灰，如Electrostatic Precipitator,電除塵器。

precipitate 魯莽的，倉(cāng)促的

pre-,在前，-cip,頭，詞源同cap,captain,-ate,形容詞后綴。即使頭在前的，一頭栽下的，引申詞義魯莽的，倉(cāng)促的。

英文詞源

precipitate (v.): "to hurl or fling down," 1520s, a back formation from precipitation or else from Latin praecipitatus, past participle of praecipitare "to throw or dive headlong," from praeceps "steep, headlong, headfirst" (see precipice). Meaning "to cause to happen, hurry the beginning of" is recorded from 1620s. Chemical sense is from 1620s; meteorological sense first attested 1863. Related: Precipitated; precipitating.
precipitate (adj.): c. 1600, from Latin praecipitatus, past participle of praecipitare "to throw or dive headlong" (see precipitate (v.)). Meaning "hasty" is attested from 1650s. Related: Precipitately.
precipitate (n.): 1560s, probably a back formation from precipitation.

雙語(yǔ)例句

1. Adding sulphate to the solution will give a precipitate.: 將硫酸鹽加入該溶液會(huì)產(chǎn)生沉淀.

2. A cool breeze caused a precipitate drop in the temperature.: 冷風(fēng)使溫度急降.

3. Clouds usually precipitate as rain or snow.: 云常會(huì)凝結(jié)成雨或雪.

4. The king was too precipitate in declaring war.: 國(guó)王在宣戰(zhàn)一事上過(guò)于輕率.

5. It would only serve to precipitate his ruin.: 它只會(huì)加速他的毀滅.

precipitate

詞態(tài)變化

助記提示

中文詞源

英文詞源

雙語(yǔ)例句

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