科学素养与生活应用·英语30篇（2）

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为何高山湖泊常呈青绿色——冰川粉导致的光散射现象

Mountain lakes shine with vivid turquoise because of fine rock particles called glacial flour.
Glaciers grind bedrock into microscopic silt that stays suspended in meltwater lakes.
Sunlight entering the water scatters strongly off these tiny particles through Rayleigh scattering.
Shorter blue and green wavelengths dominate the reflected light we see from above.
Unlike algae blooms, this color appears only in recently glaciated, nutrient-poor basins.
The effect intensifies on clear, sunny days when light penetration is deepest.
Water depth and particle concentration jointly determine the exact shade of turquoise observed.
Scientists use satellite imagery of this hue to monitor glacier retreat rates globally.
No chemical dyes or pollutants cause this phenomenon—it’s purely physical optics in action.
Even after glaciers vanish, residual flour can tint lakes for decades under stable conditions.

听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。

Glaciers grind bedrock into microscopic silt that stays suspended in meltwater lakes. 冰川将基岩研磨成微米级淤泥，悬浮于融水湖中。
Unlike algae blooms, this color appears only in recently glaciated, nutrient-poor basins. 与藻华不同，这种颜色仅出现在近期受冰川作用、养分贫乏的湖盆中。
The effect intensifies on clear, sunny days when light penetration is deepest. 晴朗无云的日子里，光线穿透最深，这种效应尤为显著。

这篇中文题目最接近哪一句？为何高山湖泊常呈青绿色——冰川粉导致的光散射现象一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？山地湖泊因一种名为“冰川粉”的细微岩石颗粒而呈现出鲜艳的翠绿色。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Why Mountain Lakes Often Appear Turquoise Due to Light Scattering by Glacial Flour How to cook noodles A maths worksheet

Glaciers grind bedrock into microscopic silt that stays suspended in meltwater lakes.

Glaciers grind bedrock into microscopic silt that stays suspended in meltwater lakes.

第一版：录下来、回听、再听标准音。系统打分以后再加。

用今天的表达，自己说一句。

例子：Glaciers grind bedrock into microscopic silt that stays suspended in meltwater lakes.