1.
The moon orbits the earth.
月球绕地球轨道运行。
2.
The satellite itself will orbit around the earth for a period of days.
卫星本身将绕地球轨道运行一段时间。
3.
The man-made satellite orbits the earth every 48 hours.
那颗人造卫星每48小时绕地球轨道运行一周。
4.
The satellite is orbiting around the earth.
卫星正绕着地球轨道运行。
5.
The moon does not describe a circle round the earth, but rather an ellipse
月球绕地球运行的轨道不是浑圆的，而是椭圆的。
6.
How many spacecrafts have orbited the moon?
有多少艘太空船绕月球轨道运行?
7.
How many spacecraft have orbited around the moon?
有多少宇宙飞船围绕月球轨道运行过？
8.
orbit of artificial earth satellite
人造地球卫星运行轨道
9.
We can draw the earth's orbit round the sun.
我们可以画出地球绕太阳运行的轨迹。
10.
The comets' offspring, the meteor swarms, travel in regular orbits, similar to the earth's orbit around the sun.
彗星的后裔，即流星团，沿正常的轨道运行，与地球绕太阳运行的轨道相似。
11.
Once in space, the spacecraft went into orbit around the Earth.
一旦进入太空，太空船就进入环绕地球运行的轨道。
12.
The shuttle went into orbit on schedule to enable it to circle the earth at least once.
航天飞机已按预定时间进入轨道，从而使它至少能绕地球运行一周。
13.
A satellite's circle around the earth.
卫星绕地球的环形轨道
14.
In the same way there exists a pull between the earth and the moon, which keeps the moon travelling in its orbit around our planet, the earth.
地球和月球之间也同样存在着引力，这使月球在围绕着地球的轨道上运行。
15.
the great circle representing the apparent annual path of the sun; the plane of the Earth's orbit around the sun; makes an angle of about 23 degrees with the equator.
在地球上看到的太阳运行的轨道；地球绕着太阳转的平面；与赤道平面大致成度角。
16.
How many spacecraft have orbited the moon?
有多少艘太空船已经绕月球轨道运行过?
17.
The mirrors could orbit -- thousands of miles high -- at the same speed as the earth turns on its axis.
反射镜可在数千英里的高空以地球绕地轴运行的同样速度做轨道运行。
18.
Planetary perturbations make the earth's orbit about the sun irregular.
行星的摄动使得地球绕太阳的轨道是不规则的。