蜂鸟正在吸食花蜜。

The hummingbird is ___feeding on nectar.

鸟儿正在为幼鸟喂食。

The bird is ___feeding its chicks.

每天早晨，她都会给公园里的鸽子喂食。

Every morning, she enjoys ___feeding the pigeons in the park.

这台机器正在持续向系统输送数据。

The machine is ___feeding data into the system continuously.