lift off

US /ˈlɪft ɔf/
UK /ˈlɪft ɔf/
"lift off" picture
1.

起飞, 发射

the action of a spacecraft, rocket, or helicopter leaving the ground

:
The space shuttle's lift-off was delayed due to bad weather.
由于恶劣天气,航天飞机的发射被推迟了。
We watched the helicopter's smooth lift-off from the helipad.
我们看着直升机从停机坪平稳地起飞
1.

起飞, 升空

for a spacecraft, rocket, or helicopter to leave the ground

:
The rocket is scheduled to lift off at dawn.
火箭定于黎明时分升空
The drone began to lift off slowly from the ground.
无人机开始缓慢地升空