precipitation
precipitation 英 [prɪˌsɪpɪˈteɪʃn] 美 [prɪˌsɪpɪˈteʃən]
n. [化学] 沉淀，[化学] 沉淀物；降水；冰雹；坠落；鲁莽
名词复数:precipitations
- Precipitation is rain, snow, sleet, or hail — any kind of weather condition where something's falling from the sky.
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- n. [化学] 沉淀，[化学] 沉淀物；降水；冰雹；坠落；鲁莽
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1. But with no signs of any precipitation, the prospect of the harvest looks bleak.
但是由于没有任何降水的迹象，收获的前景看起来很渺茫。
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2. Methods outlined in the monograph include: use of crushed clay pots, bone charcoal, contact precipitation, or use of activated alumina (absorptive filter).
专著中概述的方法包括：使用粗砂壶、骨炭、接触沉淀，或使用活性氧化铝（吸收型过滤器）。
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3. “We have a long paleorecord for precipitation, and you see that there was almost a switch. The monsoon was either on, or it was off, with very little in between,” said Levermann.
我们得到了有关降水的很长一段历史记录，从中可以发现季风有一个开关，要么开着，要么关闭，很少出现中间状况，“莱韦尔曼说。
- 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 (genitive praecipitis) "steep, headlong, headfirst," from prae "before, forth" (see pre-) + caput "head" (from PIE root *kaput- "head"). 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.
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