beak的复数形式怎么写？

Later, the beak, claws and keel become very soft and pliable.此后, 喙 、 爪和胸骨变得很软和易弯曲.A pigeon probably has his Huff Duff in that incrustation above his beak.鸽子也有它的无线电高频测向仪,也许就是它喙上部的那个硬包吧.The gull held the fish in its beak.海...

The gull held the fish in its beak.海鸥嘴里叼着鱼。the bird's horny beak鸟的角质喙The bird had a worm in its beak.鸟儿嘴里叼着一条虫....

beak的音标：beak的英式发音音标为：[bi:k]beak的美式发音音标为：[bik]...

n.（猛禽等的）嘴，喙，鹰钩鼻，地方执法官...