Yes, those flappy bits at the back.

，就是后边垂下两片。

Bichirs too can make flappy forays over land, but they walk in a very different way.

Bichirs 也可以在陆地上进行轻快尝试，但它们行走方式却截然不同。

Four legs, a long, scaly tail, and flappy wings that looked way too large for its body.

四条，一条长长鳞片状尾巴， 以及拍打着翅膀， 看起来它身体来说太大了。

But over time, the butterfly's eyes get bigger and more complex, it grows antenna, its body shape changes, and of course, those proto wings-grow into their full, flappy splendor.

但是随着时间推移，蝴睛变得越来越大，越来越复杂，它长出了触角，它体型发生了变化，当然，那些原始翅膀——长成了它们完整、轻盈光彩。