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並前往 https://www.khanacademy.org/science/in-in-class10th-physics/in-in-the-human-eye-and-the-colourful-world/in-in-scattering-of-light-and-tyndall-effect/v/why-is-the-sky-blue
是否確定要離開？
確定！ 回上一頁
