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Why Do Mountains Look Bluer the Farther Away They Are?
为什么远处的山看起来更蓝？
精读先不看文字，完整听一遍。
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Distant mountains appear bluish due to Rayleigh scattering—the same effect that makes skies blue.远处的山峦因瑞利散射而呈现蓝色——这与天空呈蓝色的原理相同。
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Sunlight contains all colors, but shorter blue wavelengths scatter more easily off air molecules and tiny particles.阳光包含所有颜色，但波长较短的蓝光更容易被空气分子和微小颗粒散射。
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As light travels farther through the atmosphere, more red and yellow light reaches our eyes directly.光线在大气中传播得越远，越多红光和黄光直接进入我们的眼睛。
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Meanwhile, scattered blue light fills the space between us and the mountain, acting like a translucent veil.与此同时，散射的蓝光充满我们与山峦之间的空间，宛如一层半透明薄纱。
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This atmospheric haze reduces contrast and softens edges, making peaks look less sharp and more dreamlike.这种大气薄雾降低了对比度、柔化了边缘，使山峰显得不那么锐利，更具梦幻感。
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On humid or polluted days, the effect intensifies because larger particles scatter even more light.在潮湿或污染严重的日子里，该效应会加剧，因为更大的颗粒会散射更多光线。
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Photographers call this ‘aerial perspective’ and use it deliberately to create depth in landscape images.摄影师称之为‘空气透视’，并刻意利用它在风景照中营造景深。
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Mountains closer to you reflect their true rock-and-vegetation colors, while distant ones blend with sky tone.离你较近的山峦反射出真实的岩石与植被色彩，而远处的山峦则与天空色调融为一体。
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At sunrise or sunset, warm light can overpower this blue cast, revealing orange or purple mountain silhouettes.日出或日落时，温暖的光线可压倒这种蓝色调，显露出橙色或紫色的山峦剪影。
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Satellites correct for this scattering effect when mapping Earth’s surface accurately from space.卫星在从太空精确测绘地球表面时，会校正这种散射效应。
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
- Satellites correct for this scattering effect when mapping Earth’s surface accurately from space. 卫星在从太空精确测绘地球表面时，会校正这种散射效应。
- Distant mountains appear bluish due to Rayleigh scattering—the same effect that makes skies blue. 远处的山峦因瑞利散射而呈现蓝色——这与天空呈蓝色的原理相同。
- On humid or polluted days, the effect intensifies because larger particles scatter even more light. 在潮湿或污染严重的日子里，该效应会加剧，因为更大的颗粒会散射更多光线。
④ 懂 · 选一选
⑤ 今天会说这一句
Satellites correct for this scattering effect when mapping Earth’s surface accurately from space.
⑥ 跟读并录音
Satellites correct for this scattering effect when mapping Earth’s surface accurately from space.
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：Satellites correct for this scattering effect when mapping Earth’s surface accurately from space.
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。