When he tried to climb the tree, it was very clear that the hippo didn't have wings to fly, or claws to climb with.
当他试图爬树时，很明显，河马没有翅膀来飞翔，也没有爪子来攀爬。
The wings of the chicken have become vestigial; it can no longer fly.
鸡的翅膀逐渐退化， 不会在空中飞行了。
Swallowtails have large, slow-beating wings that means they fly unlike other butterflies.
燕尾蝶有巨大的翅膀，并且扇动的频率很慢，这意味着它们的飞行方式和其他蝴蝶是不同的。
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