Article
装置火炉注意点 - Be careful when installing the stove

Column title: 科學常識 - General scientific knowledge
Subject matters: 新知 - new knowledge,
Language level: Baihua

Keywords: safety,

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Article
小孩子们 - The littel children

Column title: 科學常識 - General scientific knowledge
Subject matters: 新知 - new knowledge,
Language level: Baihua

Keywords: health, suggestion,

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