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How Ants Build Strong Underground Tunnels
蚂蚁如何建造坚固的地下隧道
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Ants dig tunnels using their strong jaws and legs carefully.蚂蚁用强健的颚和腿小心地挖掘隧道。
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They carry soil out one grain at a time to build entrances.它们一次搬运一粒土，筑成入口。
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Tunnels stay open because ants pack walls with sticky saliva.蚂蚁用黏性唾液夯实隧道壁，使隧道保持畅通。
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Some tunnels slope slightly to prevent flooding during rain.部分隧道略微倾斜，以防下雨时积水。
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Ventilation shafts let fresh air flow deep underground.通风竖井让新鲜空气深入地下。
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No single ant knows the full map — they follow simple rules.没有一只蚂蚁掌握完整地图——它们只遵循简单规则。
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Engineers study ant tunnels to design better subway systems.工程师研究蚁穴结构，以优化地铁系统设计。
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This is nature’s quiet lesson in teamwork and physics.这是大自然在协作与物理原理方面给出的无声启示。