Using Magnets in Everyday Life · 磁铁在日常生活中的应用

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Words to Know · 要记的词

重点词汇 · 点击单词听发音

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Read Out Loud · 大声朗读

课文朗读 · 点播放键听整段

🏠 Magnets in everyday objects · 日常物品中的磁铁

Magnets can be found in many everyday objects. The properties of magnets — attracting iron and steel, and like poles repelling — allow us to use magnets in useful ways in our daily lives.

磁铁可以在许多日常物品中找到。磁铁的特性——吸引铁和钢，以及同名磁极相互排斥——使我们能够在日常生活中以有用的方式使用磁铁。

🧊 Refrigerator and Scrapyard · 冰箱和废品场

Strips of magnets are found inside refrigerator doors. These attract the steel frame of the refrigerator and help to keep the door closed. In a metal scrapyard, a crane with a large iron disc becomes a powerful electromagnet. It attracts objects made of iron and steel, separating them from other non-magnetic materials.

冰箱门内有磁条。这些磁条吸引冰箱的钢框架，帮助保持门关闭。在废金属回收场，一台带有大铁盘的起重机变成了强力电磁铁。它吸引铁和钢制的物体，将它们与其他非磁性材料分开。

✏️ Whiteboard and Doorstop · 白板和门档

Some whiteboards have steel sheets under the writing surface. This allows magnets to be attracted to the whiteboards, so we can use magnets to hold things on them. A magnetic doorstop uses a magnet to hold the door in place and prevent it from closing suddenly.

一些白板在书写面下有钢板。这使磁铁可以被吸附在白板上，我们可以用磁铁在上面固定东西。磁性门档用磁铁将门固定在原位，防止门突然关闭。

🚄 Maglev Trains · 磁悬浮列车

Maglev trains have magnets on the bottom of the trains. There are also magnets on the train tracks. The magnets on the train and the tracks are like poles — they repel each other. This allows the train to 'float' above the track. Because there is no friction with the track, maglev trains can travel at very high speeds.

磁悬浮列车底部装有磁铁。轨道上也有磁铁。列车和轨道上的磁铁是同名磁极——它们相互排斥。这使列车能够"悬浮"在轨道上方。由于与轨道没有摩擦，磁悬浮列车可以以非常高的速度行驶。

💡 Maglev uses repulsion (like poles). This is different from most everyday magnet uses, which rely on attraction. 磁悬浮利用的是排斥力（同名磁极），而大多数日常磁铁用途是利用吸引力。

🏥 MRI Scanner · 磁共振扫描仪

An MRI scanner (Magnetic Resonance Imaging) is used in hospitals. It has a large round magnet with a tunnel in the centre. A patient lies on a table that slides into the tunnel. The magnet takes detailed pictures of the inside of the body. These pictures can help identify problems. MRI is a safe and painless test.

磁共振扫描仪（MRI）用于医院。它有一个大型圆形磁铁，中间有一个隧道。病人躺在桌上，桌子滑入隧道。磁铁拍摄身体内部的详细图像。这些图像可以帮助发现问题。MRI是一种安全且无痛的检查。

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Magnets Around Us · 我们身边的磁铁

日常应用一览

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Refrigerator door · 冰箱门

Magnetic strip keeps the door closed · 磁条保持门关闭

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Scrapyard crane · 废品场起重机

Electromagnet separates iron/steel · 电磁铁分离铁和钢

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Magnetic whiteboard · 磁性白板

Steel sheet underneath attracts magnets · 下面的钢板吸附磁铁

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Doorstop · 门档

Holds the door, prevents sudden closing · 固定门，防止突然关闭

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Maglev train · 磁悬浮列车

Like poles repel → train floats → high speed · 同名磁极排斥→列车悬浮→高速

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MRI scanner · 磁共振仪

Large magnet scans inside body safely · 大型磁铁安全扫描身体内部

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I'm Inspired: Michael Faraday · 科学家故事：法拉第

The man who connected magnetism and electricity · 连接磁与电的人

⚡ Michael Faraday (1791–1867)

Michael Faraday was an English scientist born in 1791. As a teenager, he worked for a bookbinder and read many science books after work. He was particularly interested in magnetism. Faraday is famous for discovering the link between magnetism and electricity. He constructed the world's first electric motor. Today, electric motors are found in everyday appliances like fans and washing machines.

法拉第是1791年出生的英国科学家。少年时，他在一家书商工作，下班后阅读了大量科学书籍。他对磁学特别感兴趣。法拉第因发现磁与电的联系而著名。他制造了世界上第一台电动机。如今，电动机在风扇和洗衣机等日常电器中随处可见。

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Likely Test Questions · 考试常考

重点考点

⭐ These are the most likely questions to appear on tests! 这些是考试最可能出现的问题！