| 单词 | escape speed |
| 释义 | > as lemmasescape speed escape speed n. ΚΠ 1951 Tuscaloosa News 16 Oct. 4/6 The problem of reaching the moon is basically that of getting rockets to fly fast enough to attain an ‘escape’ speed—an escape speed being about 23,000 miles an hour—sufficient to escape from the pull of the earth's gravity. < as lemmas |
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