一架无人机从高空坠落，砸在了空地上。

Yī jià wúrénjī cóng gāokōng zhuìluò, zá zài le kōngdì shàng.

A drone fell from high altitude and crashed onto an open area.

那片树叶从枝头缓缓坠落到地面。

Nà piàn shùyè cóng zhītóu huǎnhuǎn zhuìluò dào dìmiàn.

That leaf slowly fell from the branch to the ground.

飞机引擎失灵后，迅速向海面坠落。

Fēijī yǐnqíng shīlíng hòu, xùnsù xiàng hǎimiàn zhuìluò.

After the plane's engine failed, it rapidly plunged toward the sea.