When the wings dry off, they can fly.

当翅膀干了以后，它们就可以飞了。

youdao

Birds have feathers to make them warm and dry. They also help birds to fly.

鸟用羽毛给自己保暖和保持干燥，羽毛也帮鸟飞翔。

youdao

Birds have feathers to make them warm and dry. They also help birds to fly.

鸟用羽毛给自己保暖和保持干燥，羽毛也帮鸟飞翔。

youdao