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Why Solar Panels Work Even on Cloudy Days
为什么阴天太阳能板仍能发电
精读先不看文字，完整听一遍。
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Solar panels generate electricity from visible and near-infrared light—not just direct sunlight.太阳能电池板利用可见光和近红外光发电，而不仅依赖直射阳光。
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Clouds scatter light, but diffuse radiation still reaches panels and creates usable current.云层会散射光线，但漫射辐射仍能到达电池板并产生可用电流。
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Efficiency drops to 10–25% of full-sun output, yet modern cells capture more low-light photons.发电效率降至晴天时的10%–25%，但现代电池片能捕获更多弱光光子。
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Cooler temperatures on cloudy days actually improve panel voltage slightly, offsetting some loss.阴天温度较低，反而略微提升电池板电压，部分抵消了功率损失。
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Tilted mounting and anti-reflective glass help gather scattered light from wider angles.倾斜安装和防反射玻璃有助于从更广角度收集散射光。
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Battery storage systems store surplus daytime energy for use during nighttime or storms.储能电池系统可储存白天富余电能，供夜间或暴风雨期间使用。
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In Germany—a country with frequent cloud cover—solar supplies over 10% of annual electricity.德国常年多云，太阳能仍供应其全年超10%的电力。
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Regular cleaning removes dust and pollen that block even diffuse light more than people realize.定期清洁可去除遮挡漫射光的灰尘与花粉——其影响远超人们认知。
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
- Solar panels generate electricity from visible and near-infrared light—not just direct sunlight. 太阳能电池板利用可见光和近红外光发电，而不仅依赖直射阳光。
- Tilted mounting and anti-reflective glass help gather scattered light from wider angles. 倾斜安装和防反射玻璃有助于从更广角度收集散射光。
- Clouds scatter light, but diffuse radiation still reaches panels and creates usable current. 云层会散射光线，但漫射辐射仍能到达电池板并产生可用电流。
④ 懂 · 选一选
⑤ 今天会说这一句
Solar panels generate electricity from visible and near-infrared light—not just direct sunlight.
⑥ 跟读并录音
Solar panels generate electricity from visible and near-infrared light—not just direct sunlight.
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：Solar panels generate electricity from visible and near-infrared light—not just direct sunlight.
已记下。连续天数以后会显示在课表里。
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