Article
我的汽水製法 - Making Soda-water

Column title: 常識 - Common Knowledge
Subject matters: 新知 - new knowledge,
Language level: Baihua

Keywords: general knowledge,

Notes:
常識

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Article
廢物利用 - Using Waste Material

Column title: 常識 - Common Knowledge
Subject matters: 新知 - new knowledge,
Language level: Wenyan

Keywords: general knowledge,

Notes:
常識

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Article
舊夏布變白法 - A Way to Bleach Old Summer Cloth

Column title: 常識 - Common Knowledge
Subject matters: 新知 - new knowledge,
Language level: Baihua

Keywords: general knowledge,

Notes:
常識

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