This family of planets, with their moons, is known as the solar system.

这个行星家庭以及它们的卫星，就是我们所知道的太阳系。

youdao

This family of planets, with their moons, is known as the solar system.

这个行星家庭以及它们的卫星，就是我们所知道的太阳系。

youdao