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Watch Later 18:47

3.3_3_天氣的觀測(二)

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3.3_3_天氣的觀測(一)

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3.3_1_熱和生活

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3.3_1_科學探究

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3.3_1_科學的觀察

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3.3_1_冷和熱

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3.2_4_綠化社區

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3.2_4_愛惜樹木

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3.2_3_樂在自然中

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