Article
角子鑑別法 - how to identify slots

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

Keywords: general knowledge,

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Article
冬雞生蛋 - chicken lays eggs in winter

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

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