科技与生活常识·英语30篇（1）

3 / 30

已读 0 / 30 课

太阳能电池板如何将阳光转化为电能——即使在阴天也能工作

Solar panels contain photovoltaic cells made mainly of silicon, a semiconductor material.
When sunlight hits these cells, photons knock electrons loose from silicon atoms.
An internal electric field then pushes those free electrons in one direction, creating current.
This direct current (DC) flows through wires to an inverter, which converts it to AC power.
Even diffuse light on cloudy days contains enough photons to generate useful electricity.
Modern panels capture about 22% of incoming sunlight, up from just 6% in the 1950s.
Temperature matters too: very hot days slightly reduce efficiency, despite more sun.
Mounting angle and roof orientation also affect output, so installers use digital tools to optimize placement.
Batteries can store extra power for nighttime use, making solar more reliable than many assume.
Over their 25-year lifespan, most panels produce far more energy than was used to make them.

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 photovoltaic cells made mainly of silicon, a semiconductor material. 太阳能电池板含有主要由半导体材料硅制成的光伏电池。
When sunlight hits these cells, photons knock electrons loose from silicon atoms. 阳光照射这些电池时，光子会将硅原子中的电子撞离。
Temperature matters too: very hot days slightly reduce efficiency, despite more sun. 温度也有影响：酷热天气虽阳光更强，却会略微降低效率。

这篇中文题目最接近哪一句？太阳能电池板如何将阳光转化为电能——即使在阴天也能工作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？太阳能电池板含有主要由半导体材料硅制成的光伏电池。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 Solar Panels Turn Sunlight Into Power — Even on Cloudy Days How to cook noodles A maths worksheet

Solar panels contain photovoltaic cells made mainly of silicon, a semiconductor material.

Solar panels contain photovoltaic cells made mainly of silicon, a semiconductor material.

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 photovoltaic cells made mainly of silicon, a semiconductor material.