| 单词 | launch window |
| 释义 | > as lemmaslaunch window launch window n. a period outside which the planned launch of a spacecraft cannot take place if the journey is to be completed, owing to the changing positions of the planets. ΘΚΠ society > travel > air or space travel > space flight > [noun] > a space shot or flight > launching of spacecraft > period suitable for window1962 launch window1965 1965 Newsweek 29 Nov. 40/3 It is thought they may even try a third shot before the launch window closes in December. 1966 Sci. News 3 Sept. 165 The 20-day period centered around the launch date allowing travel between planets on an orbit requiring the least amount of energy. This is the so-called ‘launch window’ used to hurl space vehicles from earth to the moon. 1968 Radio Times 19 Dec. 41/4 As to timing, they must choose a launch window several days long when the Moon is in the right position relative to the Earth, when the sun is in the right position relative to the lunar landing sites, and when Apollo 8 can return to a suitable landing on Earth. < as lemmas |
| 随便看 |
|
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。