很多长有羽毛的恐龙因为没有翅膀，或相对于长毛的前肢来说身体过于沉重，因此也无法飞行。

Many feathered dinosaurs did not have wings or were too heavy, relative to the length of their feathered limbs, to fly.

youdao

动物没有新的滑翔方式。鱼，蜥蜴，甚至是蛇已经知道飞行需要翅膀。

Gliding animals are nothing new to science. Fish, lizards and even snakes have been known to "fly" without wings.

youdao

动物没有新的滑翔方式。鱼，蜥蜴，甚至是蛇已经知道飞行需要翅膀。

Gliding animals are nothing new to science.Fish, lizards and even snakes have been known to "fly" without wings.

youdao