科技与生活常识·英语30篇（1）

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为什么回收铝比新制铝节省95%以上的能源

Making aluminum from raw bauxite ore requires massive amounts of electricity to separate metal from oxygen.
The electrolytic process, called Hall-Héroult, operates at over 950°C and consumes huge power.
Recycling scrap aluminum skips mining, refining, and smelting—only melting is needed.
Melting used aluminum takes just 5% of the energy required for primary production.
One recycled soda can saves enough energy to power a TV for three hours.
Aluminum can be recycled endlessly without losing quality or strength.
Sorting facilities use magnets, eddy currents, and optical scanners to separate aluminum from other metals.
Global recycling rates for aluminum packaging hover near 70%, far above most other materials.
This energy advantage makes aluminum one of the most environmentally smart choices for packaging.
Every ton of recycled aluminum also avoids four tons of bauxite waste and greenhouse gas emissions.

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

Aluminum can be recycled endlessly without losing quality or strength. 铝可无限次循环利用，且不损失质量与强度。
Recycling scrap aluminum skips mining, refining, and smelting—only melting is needed. 回收废铝无需采矿、精炼和冶炼，只需熔化。
The electrolytic process, called Hall-Héroult, operates at over 950°C and consumes huge power. 电解法（霍尔-埃鲁法）在950°C以上运行，耗电量巨大。

这篇中文题目最接近哪一句？为什么回收铝比新制铝节省95%以上的能源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？从原生铝土矿中提炼铝需要大量电力来分离金属与氧。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 Recycling Aluminum Saves 95% More Energy Than Making It New How to cook noodles A maths worksheet

Aluminum can be recycled endlessly without losing quality or strength.

Aluminum can be recycled endlessly without losing quality or strength.

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：Aluminum can be recycled endlessly without losing quality or strength.