| 单词 |
dew-point |
| 释义 |
dew-point|ˈdjuːpɔɪnt|
a. That point of atmospheric temperature at which dew begins to be deposited.
1833N. Arnott Physics (ed. 5) II. 47 The degree of heat at which the dew begins to appear is called the dew-point, being an important particular in the meteorological report of the day. 1854Hooker Himal. Jrnls. I. i. 14 This indicated a dew-point of 11½°. 1878Huxley Physiogr. 52 When the temperature is sufficiently lowered, the dew-point is reached.
b. attrib., as dew-point apparatus, dew-point depression, dew-point front, dew-point hygrometer, dew-point meter.
1843Proc. Amer. Phil. Soc. II. 249 Professor Baebe described a dew-point hygrometer. 1933Discovery Dec. 360/1 The dew-point apparatus..is designed to discover the temperature to which a metal must be cooled before dew will deposit upon it. 1956W. A. Heflin U.S. Air Force Dict. 165/1 Dew point depression, the lowering of the dew point by decreasing water content or pressure. 1958Engineering 4 Apr. 422/1 A dew point meter for use with any gases that are not corrosive to brass or copper. 1960Aeroplane XCIX. 624/1 The dew-point front is the boundary between moist ‘maritime tropical’ air..and dry ‘tropical continental’ air. |
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