十万个为什么·科学启蒙30篇（2）

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太阳能电池板如何把阳光变成电？

Solar panels contain many silicon-based photovoltaic cells that absorb sunlight.
When photons hit these cells, they knock electrons loose from their atoms.
This movement of free electrons creates an electric current inside the cell.
Metal contacts on the top and bottom of each cell collect this current for use.
An inverter then changes the direct current (DC) into alternating current (AC) for homes.
Efficiency depends on light intensity, panel angle, and how clean the surface is.
Even on cloudy days, panels still generate some electricity—just less than in full sun.
Newer panels use multiple layers to capture different light wavelengths more effectively.
They produce no emissions while operating, making them vital for clean energy goals.
Regular maintenance and smart placement help maximize long-term power output.

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

Solar panels contain many silicon-based photovoltaic cells that absorb sunlight. 太阳能电池板包含多个基于硅的光伏电池，可吸收阳光。
Regular maintenance and smart placement help maximize long-term power output. 定期维护和科学安装有助于长期最大化发电量。
When photons hit these cells, they knock electrons loose from their atoms. 当光子撞击这些电池时，会将电子从原子中击出。

这篇中文题目最接近哪一句？太阳能电池板如何把阳光变成电？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？太阳能电池板包含多个基于硅的光伏电池，可吸收阳光。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） How Do Solar Panels Turn Sunlight into Electricity? How to cook noodles A maths worksheet

Solar panels contain many silicon-based photovoltaic cells that absorb sunlight.

Solar panels contain many silicon-based photovoltaic cells that absorb sunlight.

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：Solar panels contain many silicon-based photovoltaic cells that absorb sunlight.