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Sun-Earth-Moon | Flash simulation, Animation, Illustration, Picture, Diagram

The motions of the Moon around the Earth and of the Earth around the Sun are complex. The motions involved in revolutions are superimposed on the movements involved in rotations. The Earth and the Moon both turn on their own axis (rotation), but both also...

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一朋友女朋友即將到國外出差,走之前說給他把屋子換一個新床。他高興的不行,天天拉著我們吹噓他女朋友對他有多好。結果貨一到,他抱著我就淚奔了。。。哭的那個慘呀。。。...

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