科学素养与生活应用·英语30篇（1）

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磁悬浮列车如何悬浮？为何它们无需车轮与轨道接触

Maglev trains float using powerful electromagnets that repel or attract the track beneath them.
Electromagnetic suspension (EMS) pulls the train upward toward a ferromagnetic rail overhead.
Electrodynamic suspension (EDS) uses superconducting magnets on the train to induce repulsion in conductive guideways.
Because there’s no physical contact, friction drops nearly to zero, allowing speeds over 600 km/h.
Cooling magnets to cryogenic temperatures enables superconductivity and stable levitation.
Guidance magnets keep the train centered laterally without mechanical steering systems.
Energy use per passenger-kilometer is lower than airplanes at medium distances.
Japan’s SCMaglev holds the world record at 603 km/h during test runs.
Unlike conventional rails, maglev guideways require precise alignment and electromagnetic shielding.
Maintenance is reduced since there’s no wheel wear, rail corrosion, or engine vibration.

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

Cooling magnets to cryogenic temperatures enables superconductivity and stable levitation. 将磁体冷却至极低温，可实现超导性与稳定悬浮。
Guidance magnets keep the train centered laterally without mechanical steering systems. 导向磁体在无需机械转向系统的情况下，使列车横向居中运行。
Energy use per passenger-kilometer is lower than airplanes at medium distances. 中等距离下，人均每公里能耗低于飞机。

这篇中文题目最接近哪一句？磁悬浮列车如何悬浮？为何它们无需车轮与轨道接触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？磁悬浮列车利用强大的电磁铁，通过排斥或吸引下方轨道实现悬浮。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 Magnetic Levitation Trains Float—and Why They Don’t Need Wheels or Rails How to cook noodles A maths worksheet

Cooling magnets to cryogenic temperatures enables superconductivity and stable levitation.

Cooling magnets to cryogenic temperatures enables superconductivity and stable levitation.

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：Cooling magnets to cryogenic temperatures enables superconductivity and stable levitation.