飞机安全降落了。

Fēijī ānquán jiàngluò le.

The airplane landed safely.

火箭成功降落月球。

Huǒjiàn chénggōng jiàngluò Yuèqiú.

The rocket successfully landed on the moon.

飞机开始降落了。

Fēijī kāishǐ jiàngluò le.

The airplane has begun its descent.