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STEM Light Read: How Termite Mounds Maintain Constant Internal Temperatures (2026-D022)
STEM轻科普：白蚁丘如何维持恒定内部温度（2026-D022）
精读先不看文字，完整听一遍。
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Termite mounds in Africa can stay at 31°C day and night despite outside temperatures swinging from 2°C to 40°C.非洲白蚁丘昼夜恒温31°C，而外界温度在2°C至40°C间大幅波动。
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Their porous clay walls act like lungs, drawing in cool air at dawn and expelling warm air at dusk.其多孔黏土墙如同肺部，清晨吸入凉气，傍晚排出热气。
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Convection currents rise through central chimneys while fresh air enters via underground tunnels.对流气流沿中央烟囱上升，新鲜空气则经地下隧道流入。
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Solar heating warms outer walls, creating pressure differences that drive passive airflow without fans.阳光加热外墙，形成压力差，驱动无风扇的被动气流。
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Engineers have modeled these structures to design energy-free building ventilation systems.工程师借鉴这些结构，设计出无需能源的建筑通风系统。
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Infrared imaging shows heat flows follow precise architectural symmetry, not random construction.红外成像显示，热量流动遵循精确的建筑对称性，而非随机建造。
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The mound’s orientation aligns with seasonal sun paths to optimize thermal regulation year-round.白蚁丘朝向与季节性太阳轨迹一致，全年优化热调节。
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Microbial activity inside decomposes wood, generating steady low-level heat that stabilizes core zones.内部微生物分解木材，持续释放微弱热量，稳定核心区域温度。
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Studies confirm colonies collapse if mound geometry is artificially altered, proving form enables function.研究表明，若人为改变白蚁丘几何形态，蚁群便会崩溃，证明形态决定功能。
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This natural HVAC system operates continuously for decades with zero electricity input.这一天然暖通空调系统可连续运行数十年，完全无需电力。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- Engineers have modeled these structures to design energy-free building ventilation systems. 工程师借鉴这些结构，设计出无需能源的建筑通风系统。
- Infrared imaging shows heat flows follow precise architectural symmetry, not random construction. 红外成像显示，热量流动遵循精确的建筑对称性，而非随机建造。
- This natural HVAC system operates continuously for decades with zero electricity input. 这一天然暖通空调系统可连续运行数十年，完全无需电力。
④ 懂 · 选一选
⑤ 今天会说这一句
Engineers have modeled these structures to design energy-free building ventilation systems.
⑥ 跟读并录音
Engineers have modeled these structures to design energy-free building ventilation systems.
第一版：录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达，自己说一句。
例子：Engineers have modeled these structures to design energy-free building ventilation systems.
已记下。连续天数以后会显示在课表里。
陈老师指导
课程开发中，敬请期待。成人和孩子都可以先自学听读、精读。
这边的讲解音轨还在做。想先跟着老师走完固定 30 课，可以去陈老师带读社（和自学通行不是同一份会员）。
课程开发中，敬请期待。