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
了一下网路
资料，似乎也没有讨论他嘴
原因文献，可能有很久以前，不过就不
了。
曲
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.
我了一下网路资料，似乎也没有讨论他嘴原因文献，可能有很久以前，不过就不了。
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