科学素养与生活应用·英语30篇（3）
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How Magnets Stick to Refrigerators
磁铁为何能吸附在冰箱上
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Refrigerator doors contain thin layers of steel metal.冰箱门内含薄层钢板。
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Steel has tiny magnetic parts that respond to magnet force.钢含有微小的磁性成分，能响应磁力。
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When a magnet touches the door, it pulls those parts tightly.磁铁接触门时，会牢牢吸住这些成分。
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This creates strong attraction without glue or screws needed.由此产生强吸附力，无需胶水或螺丝。
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Not all metals hold magnets—aluminum and copper do not work.并非所有金属都能吸附磁铁——铝和铜就不行。
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Magnet strength depends on material type and surface smoothness.磁力强弱取决于材料类型和表面光滑度。
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We use this physics daily for notes, photos, and reminders.我们每天利用这一物理原理来固定便签、照片和提醒事项。
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Earth itself acts like a giant magnet with north and south poles.地球本身就像一块巨大的磁铁，有南北两极。