a rudimentary Beak.

• 未成熟的喙

a rudimentary Beak.的用法和样例：

例句

1. Its proboscis has got stuck to a lot of pollen.
   它的喙上粘了很多花粉。
2. The male's orange beak differentiates it from the female.
   那种鸟雄鸟的喙呈橙色，与雌鸟不同。