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。
It's a satellite in orbit round the Earth.
它是在绕地球轨道上运行的人造卫星。
The Russians plan to put a satellite into orbit round Mars.
俄国人计划把一颗人造卫星送入环绕火星的轨道。
The spacecraft is in orbit (ie moving in orbit) round the moon.
该航天器在绕月球轨道上飞行。
The spacecraft is in orbit (ie moving in orbit) round the moon.
该航天器在绕月球轨道上飞行。
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