一个典型的例子就是鸣禽的雏鸟在父母带着食物归巢时所表现出的吵闹的乞食行为。

A classic example is noisy begging by nestling songbirds when a parent returns to the nest with food.

youdao

一个典型的例子就是鸣禽的雏鸟在父母带着食物归巢时所表现出的吵闹的乞食行为。

A classic example is noisy begging by nestling songbirds when a parent returns to the nest with food.

youdao