发射升空liftoff: 【航空】保险伞下降;(飞机、飞弹等的)起飞;发射(时刻) ...take: vt. (took; taken ) 1.(用手)拿,取 ...off: adv. 1.〔运动〕向那边,隔开。 be off 走, ...blastoff: 升空to take off, take-off: 起飞下载手机词典可随时随地查词查翻译