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precipitation noun

  /pɹɪˌsɪpɪˈteɪʃn̩/
  • (countable, uncountable, chemistry) A reaction that leads to the formation of a heavier solid in a lighter liquid; the precipitate so formed at the bottom of the container.
 沈殿
  • (meteorology) Any or all of the forms of water particles, whether liquid or solid, that fall from the upper atmosphere (e.g., rain, hail, snow or sleet). It is a major class of hydrometeor, but it is distinguished from cloud, fog, dew, rime, frost, etc., in that it must fall. It is distinguished from cloud and virga in that it must reach the ground.
 降水, 降水量

precipitously adverb

  /pɹɪˈsɪ.pɪ.təs.li/
  • Abruptly; quickly.
 急

precipitate verb

  /pɹəˈsɪpɪteɪt/ , /pɹɪˈsɪpɪteɪt/
  • (transitive) To make something happen suddenly and quickly.
 促進する

precipitous adjective

  /pɹɪˈsɪpɪtəs/
  • Hasty; rash; quick; sudden
 沈殿物
  • Steep, like a precipice
 急
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