nestling

The nestling opened its beak as soon as its mother landed on the branch.

雏鸟一看到妈妈落在树枝上就张开了嘴。

用法提示：nestling 是名词，指还在巢中不会飞的幼鸟。

We could see three tiny nestlings in the nest high up in the tree.

我们可以看到树顶高处巢里有三只小小的雏鸟。

用法提示：nestlings 是复数形式，仍指巢中的幼鸟。

The injured nestling was too weak to leave the nest on its own.

那只受伤的雏鸟太虚弱，无法自己离开巢。

用法提示：nestling 作名词，强调这只幼鸟仍在巢中、尚未离巢。