GbEng
你猜飞机何时要起飞? When do you guess the airplane will take off?
喷气式飞机正要起飞时出了事故。 The accident happened as the jet was about to take off.
爆炸的时间定在飞机起飞的时刻。 The explosion was timed to be simultaneous with the plane's take-off.
飞机起飞推迟了(两个小时). There was a delay (of two hours) before the plane took off.
我再说一遍: 跑道尚未畅通, 不能起飞. I repeat: the runway is not clear for take-off.