moon-earth trajectory [航] 月球地球飞行轨道
moon-earth 月球绕地球旋转平面
moon-earth transportation system 月地间运输系统
Earth-moon transfer orbit 地月转移轨道
earth-moon system 地月系 ; [天] 地月系统
Earth and Moon 地球和月球 ; 大地与月亮
earth moon system 地月系统
The moon around the earth 月亮围绕地球转 ; 月亮绕着地球转
An eclipse happens when the earth and moon are in line with the sun.
地球和月亮与太阳处在一条直线上,日食就发生了。
The moon is a satellite of earth.
月球是地球的卫星。
Years of worry that the same rockets that could take people to the moon could also bring nuclear war to Earth.
VOA: special.2009.08.16
The moon seemed to contain all of the geological imperfections of earth.
月亮似乎包含了,地球所有的地质上的缺陷。
And this is a very fast speed, of course, it's about 700 million miles per hour. So, one way to put that in perspective is to think about how long it takes for a light beam to get from earth to the moon. Does anyone have any guesses? Eight seconds, that sounds good.
当然这是一个非常快的速度,它大约是每小时7亿英里,为了更形象化,我们,看看光从地球到月球,需要多少时间,你们猜猜是多少?,8秒,猜的不错。
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