一个天文单位是地球与太阳之间的距离。

An astronomical unit is the distance between Earth and our sun.

youdao

地球与太阳之间的距离变化并不能产生季节，但它会影响季节的长短。

So Earth's varying distance from the sun doesn't create the seasons. But it does affect the length of the seasons.

youdao

因为有水，地球有了一个与众不同的未来。地球与太阳之间的距离适中，不太远，不太正。

But the earth had an exceptional future, offered to it by water, at the right distance from the sun, not too far not the near.

youdao