月球绕地球运行。
月球绕地球运行乃是常识。
That the moon moves round->around the earth is ordinary sense.
月球绕地球运行是个常识。
月球绕地球运行的轨道不是浑圆的,而是椭圆的。
The moon doesn't describe a circle round the earth, but rather an ellipse .
月球绕地球运行。
那时月球运行轨道较小,绕我们一周也就需要20天的时间,当时地球上的一天也就只有18个小时。
Its tighter orbit meant it needed just 20 days to go around us. A day on Earth back then was only 18 hours long.
机器的传动装置极富创意,由指针和刻度盘组成的装置连接两个齿轮,其引起的刻度变化代表月球的运行,这符合希帕科斯提出的月球在椭圆形轨道上绕地球运转的模式。
An ingenious pin-and-slot device connecting two gear-wheels induced variations in the representation of lunar motions according to the Hipparchos model of the Moon's elliptical orbit around Earth.
机器的传动装置极富创意,由指针和刻度盘组成的装置连接两个齿轮,其引起的刻度变化代表月球的运行,这符合希帕科斯提出的月球在椭圆形轨道上绕地球运转的模式。
An ingenious pin-and-slot device connecting two gear-wheels induced variations in the representation of lunar motions according to the Hipparchos model of the Moon's elliptical orbit around Earth.
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