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在浩瀚的宇宙空間原本是無所謂上下之分的小時候,望著夜空中的點點繁星,總會讓人產生許多美麗的遐想和疑問,比如,天上的日月星辰為什麼不會掉下來呢?美國人在我們的脚下,頭朝下倒掛在地球上生活不難受嗎?等等可笑的問…
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