飞机起飞后开始上升。

The plane started to asc after takeoff.

飞机起飞后，天气变得晴朗起来。

After takeoff, the weather cleared up.

飞机起飞时，乘客必须系安全带。

Passengers must belt up during takeoff.

飞机起飞时，请系好安全带。

Please fasten your seatbelt during takeoff.

飞机起飞前，乘客们都很兴奋。

The passengers were excited before takeoff.

飞机起飞后，大家可以自由活动。

After takeoff, everyone can move around freely.

飞机起飞时，发动机发出巨大的声音。

The engines made a loud noise during takeoff.

这架飞机起飞五分钟后坠毁了。

The plane crashed five minutes after takeoff.

这架飞机起飞五分钟后坠毁了。

The plane crashed five minutes after takeoff .

飞机起飞之前你不得抽烟。

You are not allowed to smoke until after takeoff .