precipitate
英[prɪ'sɪpɪteɪt]
美[prɪ'sɪpɪtet]
- n. [化学] 沉淀物
- vt. 使沉淀；促成；猛抛；使陷入
- vi. [化学] 沉淀；猛地落下；冷凝成为雨或雪等
- adj. 突如其来的；猛地落下的；急促的
词态变化
第三人称单数: precipitates;过去式: precipitated;过去分词: precipitated;现在分词: precipitating;副词: precipitately;
助记提示
1. pre- "before, forth" + cipit- + -ate.
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。
中文词源
precipitate 一头栽下，沉淀，凝结，降水，降雪pre-,在前，-cip,头，词源同cap,captain,-ate,使。即使头在前，一头栽下，后用于气象术语，降水，降雪，引申物理术语沉淀，沉积，积灰，如Electrostatic Precipitator,电除尘器。
precipitate 鲁莽的，仓促的pre-,在前，-cip,头，词源同cap,captain,-ate,形容词后缀。即使头在前的，一头栽下的，引申 词义鲁莽的，仓促的。
英文词源
- 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.
双语例句
- 1. Adding sulphate to the solution will give a precipitate.
- 将硫酸盐加入该溶液会产生沉淀.
来自《简明英汉词典》
- 2. A cool breeze caused a precipitate drop in the temperature.
- 冷风使温度急降.
来自《简明英汉词典》
- 3. Clouds usually precipitate as rain or snow.
- 云常会凝结成雨或雪.
来自《简明英汉词典》
- 4. The king was too precipitate in declaring war.
- 国王在宣战一事上过于轻率.
来自《简明英汉词典》
- 5. It would only serve to precipitate his ruin.
- 它只会加速他的毁灭.
来自《现代汉英综合大词典》