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TOEFL BNC: 17263 COCA: 11784

precipitation

noun
/prɪˌsɪpɪˈteɪʃn/
/prɪˌsɪpɪˈteɪʃn/
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  1. [uncountable] (specialist) rain, snow, etc. that falls; the amount of this that falls降水,降水量(包括雨、雪、冰等)
    • There is heavy precipitation in some parts of the country.该国一些地区降雨量很大。
    • Acid precipitation may cause a reduction in forest productivity.酸性降水可能导致森林生产力下降。
    • an increase in annual precipitation年降水量的增加
    • Annual precipitation ranges from 500 to 2 200 mm.年降水量从500毫米到2 200毫米不等。
    • In these areas precipitation was formerly too low to support growth.在这些地区,以前的降雨量太低,不足以支撑增长。
    Topics Weatherc2
  2. [uncountable, countable] (chemistry化学) a chemical process in which solid material is separated from a liquid沉淀;淀析
    • calcium phosphate precipitation磷酸钙沉淀
  3. Word Originlate Middle English (denoting the action of falling or throwing down): from Latin praecipitatio(n-), from praecipitare ‘throw down or headlong’, from praeceps, praecip(it)- ‘headlong’, from prae ‘before’ + caput ‘head’.

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