An avocet has a long, strongly upcurved bill which contains a complex and highly specialized system of lamellae capable of filtering out small food items.
我一下网路上资料,似乎也没有讨论他嘴上弯原因文献,可能有很久以前,不过就不太好。
An avocet has a long, strongly upcurved bill which contains a complex and highly specialized system of lamellae capable of filtering out small food items.
我一下网路上资料,似乎也没有讨论他嘴上弯原因文献,可能有很久以前,不过就不太好。
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