在我们的行星系中，地球与其他的行星都绕着太阳运动。
In our planetary system the earth and other planets move around the sun.
行星围绕着太阳运动，但他们都是自然而然的运动，不花力气。
Planets move around the sun, but they do it naturally and without effort.
也就是说，它们补偿可以太阳的运动。
In other words, they were able to compensate for the Sun's movement.
不仅是行星而且太阳也在不断地运动。
Not only the planets but also the sun is in constant motion.
于是，太阳，月亮，行星及恒星穿过天空时向西运动。
Therefore, the sun, moon, planets and stars appear to move westward across the sky.
太阳跟踪的方法主要有两种，光电跟踪和视日运动轨迹跟踪。
There are mainly two ways to track the sun, photoelectricity track and sun angle track.
日晷测量每天太阳跨过天空的运动。
A sundial measures the movement of the sun across the sky each day.
太阳很热，他便把运动衫搭在头上。
太阳不是象我们所见的绕地球运动。
第一定律（轨道定律）：所有行星都沿各自的椭圆轨道运动，太阳在该椭圆的一个焦点上。
The orbit of every planet is an ellipse with the Sun at a focus.
在太阳下歌唱，让我们在这美丽的运动中欢庆吧！
Singing the songs underneath that sun, let's rejoice in the beautiful game.
在太阳下歌唱，让我们在这美丽的运动中欢庆吧！
Singing the songs underneath that sun, let's rejoice in the beautiful game.
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