喵博士说科学|有趣的科学小知识|生活小常识
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又浓又黄的痰3——痰是告知呼吸器官健康与否的良师益友
2 minutes
Posted Jun 16, 2022 at 8:46 am.
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又浓有黄的痰2——我们在不停地吞噬着痰
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又浓又黄的痰4——令人匪夷所思的动物粘液
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