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為什麼翹翹板往後面坐就能變重

為什麼翹翹板往後面坐就能變重

Season 22 Episode 10 Published 9 months, 3 weeks ago
Description

哈囉~小朋友們!我是小艾姊姊!
你們有沒有發現,為什麼翹翹板往後面坐就能變重呢?
讓小艾姊姊來給你回答

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