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单词 atmospheric pressure
释义

WordReference Random House Unabridged Dictionary of American English © 2024
atmospheric pressure, [Meteorol.]
  1. Meteorologythe pressure exerted by the earth's atmosphere at any given point, being the product of the mass of the atmospheric column of the unit area above the given point and of the gravitational acceleration at the given point.
  2. Meteorologya value of standard or normal atmospheric pressure, equivalent to the pressure exerted by a column of mercury 29.92 in. (760 mm) high, or 1013 millibars (101.3 kilopascals). Also called barometric pressure. Cf. sea-level pressure. 
  • 1655–65

Collins Concise English Dictionary © HarperCollins Publishers::
atmospheric pressure n
  1. the pressure exerted by the atmosphere at the earth's surface. It has an average value of 1 atmosphere
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