The sun looks like it moves across the sky every day.
太阳看起来每天都在天空中移动。
In the morning, it rises in the east.
早晨，太阳从东方升起。
At noon, it is high in the sky.
中午时，太阳高挂在天空中。
In the evening, it sets in the west.
傍晚，太阳在西方落下。
But the truth is, the sun is not really moving.
但事实上，太阳并没有真正移动。
It is the Earth that is spinning.
真正移动的是地球。
The Earth spins from west to east.
地球是从西向东旋转的。
Because of this, we see the sun appear in the east in the morning.
因此，我们早晨看到太阳从东方升起。
As the Earth keeps spinning, the sun looks like it moves across the sky.
随着地球不断旋转，太阳看起来像是在天空中移动。
By the evening, the Earth has turned more, so the sun appears to go down in the west.
到了傍晚，地球继续旋转，所以太阳看起来像是在西方落下。
This is why we say, "The sun rises in the east and sets in the west."
这就是为什么我们说“太阳东升西落”。
One full spin of the Earth takes 24 hours.
地球自转一圈需要 24 小时。
This spinning is what creates day and night.
正是这种旋转导致了昼夜交替。
When our side of the Earth faces the sun, it is daytime.
当地球的一面朝向太阳时，就是白天。
When our side turns away from the sun, it is nighttime.
当地球的一面背离太阳时，就是夜晚。
This happens every day, making a cycle.
这种现象每天都会发生，形成循环。
If the Earth did not spin, one side would always be bright, and the other side would always be dark.
如果地球不旋转，一侧将永远是白天，另一侧将永远是黑夜。
Because of the Earth's movement, we can see beautiful sunrises and sunsets.
由于地球的运动，我们才能看到美丽的日出和日落。
Now you know why the sun rises in the east and sets in the west!
现在你知道为什么太阳东升西落了！
