英语词汇“pdi”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

PDI n. powered descent initiation (of a spacecraft).

ΚΠ

1969 New Scientist 17 July 115/1 The critical operation is then a ‘three-phase powered descent initiation’ or PDI, the braking manoeuvre which begins at this low point and reduces the vehicle's velocity to zero at a height of around 7000 feet.

1994 Detroit Free Press (Nexis) 10 July 6 When the instruments told them that they were 192 miles from their projected landing site, Armstrong and Aldrin would unleash decelerating thrust and begin slowing their speed for the touchdown. This was it. PDI.

单词	pdi
释义	> as lemmas PDI PDI n. powered descent initiation (of a spacecraft). ΚΠ 1969 New Scientist 17 July 115/1 The critical operation is then a ‘three-phase powered descent initiation’ or PDI, the braking manoeuvre which begins at this low point and reduces the vehicle's velocity to zero at a height of around 7000 feet. 1994 Detroit Free Press (Nexis) 10 July 6 When the instruments told them that they were 192 miles from their projected landing site, Armstrong and Aldrin would unleash decelerating thrust and begin slowing their speed for the touchdown. This was it. PDI. extracted from Pn. < as lemmas
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