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Article
鯊魚的功用, Functions of shark

小青 Xiaoqing (Author),

Article
物質冷熱的原理, Principles for materials to be cold or warm

繭翁 Jian Weng (Author),

Article
飲酒時舉杯相觸的歷史, History of bottom up

繭翁 Jian Weng (Author),

Image

魚 Fish