the initial ascent of a rocket from its launching pad
例句
用作名词 (n.)
fell unconscious
A three-day countdown for a mission to the international space station had been scheduled to start on Monday, leading to a Thursday liftoff from the Kennedy Space Center. 本来这个星期一将是航天飞机发射的倒数第三日，也就是说按照原计划这星期四航天飞机应该从肯尼迪航天中心发射升空。
Tragedy struck on what was to be a routine liftoff from Coruscant. 有一次，当他的货船在科洛桑像往常一样准备起飞时，悲剧发生了。
美
['lɪftˌɒf]
