你并不需要密不透水的外套，但是它需要对水有一定的抗性。

You don't need a waterproof outer layer, but it's good to have a significant degree of water resistance.

youdao

你并不需要密不透水的外套，但是它需要对水有一定的抗性。

You don't need a waterproof outer layer, but it's good to have a significant degree of water resistance.

youdao