The Earth is a planet in the solar system. It is the third planet from the sun and the only planet known to have life. The Earth is covered mostly by water, which makes up about 71% of its surface. The rest of the surface is made up of land, which is divided into seven continents. The Earth rotates on its axis, which takes about 24 hours to complete, causing day and night. It takes the Earth about 365 days to orbit around the sun, which is known as a year. The Earth's atmosphere is made up of gases, which protect us from the sun's harmful rays and allow us to breathe.

The Earth is a planet in the solar system.

地球是太阳系中的一颗行星。

It is the third planet from the sun and the only planet known to have life.

它是距离太阳第三近的行星，也是目前已知唯一有生命的行星。

The Earth is covered mostly by water, which makes up about 71% of its surface.

地球大部分被水覆盖着，约占地球表面的71%。

The rest of the surface is made up of land, which is divided into seven continents.

其余的表面由陆地构成，被划分成七大洲。

The Earth rotates on its axis, which takes about 24 hours to complete, causing day and night.

地球绕自转轴旋转，每转一圈需要大约24小时，导致白天和黑夜交替出现。

It takes the Earth about 365 days to orbit around the sun, which is known as a year.

地球绕太阳公转需要大约365天，这被称为一年。

The Earth's atmosphere is made up of gases, which protect us from the sun's harmful rays and allow us to breathe.

地球的大气层由气体构成，它们保护我们免受太阳有害的辐射，并使我们能够呼吸。