২২ ডিসেম্বর পৃথিবীর সবচেয়ে ছোট দিন কেন? | Shortest day of the year | Skillophy

Описание: ২২ ডিসেম্বর পৃথিবীর সবচেয়ে ছোট দিন কেন? | Shortest day of the year | Skillophy
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