十万个为什么·科学阅读30篇（3）
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How Do Ants Build Underground Cities?
蚂蚁如何建造地下城市？
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Ants dig tunnels using their strong mandibles.
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They carry tiny soil particles out one by one.
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Tunnels connect chambers for eggs, food, and queens.
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Airflow moves through different tunnel levels naturally.
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Worker ants work day and night without stopping.
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Some nests go six meters deep in dry soil.
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Temperature stays steady inside all year long.
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This shows how tiny animals engineer smart homes.