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忘記密碼
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ch0 Class Policy
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ch1 Universe
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ch2 Milky way
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ch3 Solar System
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ch4 Atmosphere
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ch5 Atmospheric Movement
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ch6 Water on Earth
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ch7 Dust Storm
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ch8 Ozone Depletion
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ch9 Global Warming
- 課程介紹
- 課程安排
- 評論
