The tides are caused by the attraction of the moon for the earth.
潮汐是由月亮对地起
。
The tides are caused by the attraction of the moon for the earth.
潮汐是由月亮对地起
。
The shape and perigee of artificial satellite orbits shall continually variate due to caused by the atmospherical drag and the earth gravity.
人造地卫星
轨道由于大气阻
地
场等因素
摄动,其形
地点位置将不断改变。
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