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Subject matters: 新知 - new knowledge,
Language level: Baihua
Keywords: general knowledge,
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久藏鮮蛋法 - fresh egg storage
Subject matters: 新知 - new knowledge,
Language level: Baihua
Keywords: general knowledge,
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廢物利用四則 - four cases of the utilization of waste
Subject matters: 新知 - new knowledge,
Language level: Baihua
Keywords: general knowledge,