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Why Do We See Mirages on Hot Roads?
为什么我们在炎热的路面上看到海市蜃楼？
精读先不看文字，完整听一遍。
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On hot days, air just above the road becomes much warmer and less dense than cooler air above.炎热天气下，路面正上方的空气比上方较冷的空气更热、更稀薄。
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Light travels faster in warm, thin air, causing it to bend upward slightly near the ground.光在温暖稀薄的空气中传播更快，导致其在地面附近略微向上弯曲。
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Your eyes and brain assume light moves in straight lines, so they misread the bent path.人眼和大脑默认光线沿直线传播，因此误判了这弯曲的路径。
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This tricks you into seeing what looks like shimmering water or a mirrored sky.这让你错觉看到波光粼粼的水面或倒映的天空。
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The effect is strongest when there’s a big temperature difference between surface and air.当地表与空气温差越大时，这种现象越明显。
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Mirages can also appear in deserts or over cold ocean surfaces, but with opposite bending.海市蜃楼也可能出现在沙漠或寒冷的海面上，但光线弯曲方向相反。
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Unlike reflections in mirrors, mirages form entirely from light refraction in layered air.与镜面反射不同，海市蜃楼完全由分层空气中光线折射形成。
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Cameras capture mirages the same way human eyes do—no special equipment needed.相机捕捉海市蜃楼的方式与人眼相同，无需特殊设备。
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Pilots sometimes see false horizons during landing due to similar atmospheric bending.飞行员着陆时有时会因类似的大气折射而看到虚假的地平线。
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Understanding mirages helps meteorologists improve weather prediction models for heatwaves.理解海市蜃楼有助于气象学家改进高温热浪的天气预报模型。
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
- Understanding mirages helps meteorologists improve weather prediction models for heatwaves. 理解海市蜃楼有助于气象学家改进高温热浪的天气预报模型。
- Cameras capture mirages the same way human eyes do—no special equipment needed. 相机捕捉海市蜃楼的方式与人眼相同，无需特殊设备。
- Pilots sometimes see false horizons during landing due to similar atmospheric bending. 飞行员着陆时有时会因类似的大气折射而看到虚假的地平线。
④ 懂 · 选一选
⑤ 今天会说这一句
Understanding mirages helps meteorologists improve weather prediction models for heatwaves.
⑥ 跟读并录音
Understanding mirages helps meteorologists improve weather prediction models for heatwaves.
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：Understanding mirages helps meteorologists improve weather prediction models for heatwaves.
已记下。连续天数以后会显示在课表里。
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