exigent
发表于 2025-3-28 18:26:31
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条街道往前推
发表于 2025-3-28 21:22:29
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枫树
发表于 2025-3-29 00:31:21
Historical Background to Astronomy,potamia , so named by the Greeks because it lies between the two great rivers: the Tigris and the Euphrates, in what is now Iraq. These records consist of wedge-shaped cuneiform characters imprinted on clay tablets, the earliest of which date back to the third millennium .. The Mesopotamians coul
柔声地说
发表于 2025-3-29 04:31:45
Elements of Modern Astronomy,d minimum distances from the sun, differ by only about 3.4 %; this would contribute a negligible amount to the seasonal climatic changes on the earth’s surface. Rather the seasons are due to the . of the earth’s rotation axis relative to the orbital plane, .. The angle of obliquity is about 23.5°, a
osteocytes
发表于 2025-3-29 07:15:00
Navigation at Sea, appropriate coordinate system to use to define positions on its surface is what would be called in coordinate geometry spherical polar coordinates. The axis of spin is taken to be the polar axis and the plane perpendicular to the axis that passes through the center of the sphere is the equatorial p
星星
发表于 2025-3-29 14:29:10
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脱离
发表于 2025-3-29 15:48:46
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thalamus
发表于 2025-3-29 22:20:45
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无辜
发表于 2025-3-30 03:52:45
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LIKEN
发表于 2025-3-30 06:44:06
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