There were sparrow hawks with white bellies, and screeching kestrels.

那是一类肚腹白色的鹞，及鸣声刺耳的鹰。

Dark back, white belly, big mouth.

黑色的背部，白色的腹部，大嘴巴。

Stay curious and scientifically speaking that is why corgis have such cute white bellies.

保持好奇，从科学角度来说，这就是为什么柯基犬有如此可爱的白色腹部。

And with a white bellied sea eagle circling above, he had better make it to the rocks.

上面有一只白腹海鹰在盘旋，他最好还是爬到岩石上。

The white bellies of penguins match the sky, and their black coats, the depths of the ocean, in what is known as " countershading" .

企鹅腹部的白色与天空的颜色相一致，背部的黑色皮毛与海洋深处的颜色相一致，这也就是我们所说的“反荫蔽”。