| 单词 | absolute ceiling |
| 释义 | > as lemmasabsolute ceiling absolute ceiling n. Originally Aeronautics the maximum altitude at which an aircraft can maintain horizontal flight in standard atmospheric conditions; (now usually) figurative a prescribed upper limit. ΘΚΠ society > travel > air or space travel > a means of conveyance through the air > aeroplane > qualities and parameters of aircraft > [noun] > maximum altitude ceiling1917 roof1917 absolute ceiling1918 1918 Bull. Exper. Dept. Airplane Engin. Div. U.S.A. Nov. 11/1 The service ceiling, or altitude at which the rate of climb is 100 ft. per min., is 17,000 ft., and the estimated absolute ceiling is slightly in excess of 20,000 ft. 1942 W. H. Wenstrom Weather & Ocean of Air i. 23 For the airplane this absolute ceiling is probably around eleven miles above sea level. 1973 Edwardsville (Illinois) Intelligencer 6 Feb. 4/4 This method will require Congress to set an absolute ceiling on spending. 2007 Energy Policy 35 1284/2 Kyoto sets limits on countries' emissions in terms of an absolute ceiling to be achieved as of a given date. < as lemmas |
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