| 单词 | posigrade rocket | 
| 释义 | > as lemmasposigrade rocket   posigrade rocket  n. a small rocket that can be fired briefly to give forward thrust to a spacecraft. ΚΠ 1961    Aeroplane 100 152/1  				Next, the three small ‘posigrade’ rockets on the blunt face of the capsule are fired to achieve separation from the booster. 1962    S. Carpenter in  J. Glenn et al.  Into Orbit 53  				This sends out an electrical impulse which explodes the bolts and fires the posigrade rockets that shove the capsule and booster apart. 1965    World Bk. Year Bk. 48/2  				It was also necessary to take into account..another figure for the thrust of the small, posigrade rockets that give the spacecraft a gentle separation push away from the booster. 1980    T. Wolfe Right Stuff 		(1981)	 xii. 263  				The posigrade rockets fired, throwing the capsule free of the rocket shaft. < as lemmas  | 
	
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