| 单词 | ground speed |
| 释义 | > as lemmasground speed ground speed n. ΚΠ 1917 Blackwood's Mag. May 805/2 Our ground speed was now a good deal greater than if we had travelled directly west. 1924 Webster's New Internat. Dict. Eng. Lang. Addenda Ground speed, the horizontal component of the velocity of an aircraft relative to the earth. 1928 C. F. S. Gamble Story N. Sea Air Station i If there be no wind..a very much greater ‘ground speed’ has to be attained..before the machine will gain enough flying speed for the wings to take some load off the floats, and eventually enable the machine to ‘take-off’ from the surface of the sea. 1967 F. G. Mercer Appl. Aviation Sci. viii. 48 An airplane flying eastward at a true airspeed..of 120 mph in still air, will have a ground speed exactly the same—120 mph. < as lemmas |
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