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Why Auroras Appear Mostly Near the Poles
为什么极光多出现在两极
精读先不看文字,完整听一遍。
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Earth's magnetic field guides charged solar particles toward the north and south poles.地球磁场引导带电的太阳粒子涌向南北两极。
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When these high-energy particles enter the upper atmosphere, they collide with oxygen and nitrogen atoms.当这些高能粒子进入高层大气时,会与氧原子和氮原子发生碰撞。
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These collisions excite atmospheric gases, which then emit colorful light as they return to normal energy states.这些碰撞激发了大气中的气体,气体在回归正常能级时便释放出绚丽的光芒。
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Because Earth's magnetic field lines converge at the poles, most particles follow them there.由于地球磁力线在两极汇聚,大多数粒子随之被引向那里。
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This funneling effect makes auroras far more frequent and vivid near the Arctic and Antarctic regions.这种汇聚效应使北极和南极地区极光更频繁、更明亮。
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Auroras rarely occur near the equator since few solar particles reach those latitudes.赤道附近极少出现极光,因为鲜有太阳粒子能抵达那些纬度。
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The strength and visibility of auroras also depend on solar activity and geomagnetic storms.极光的强度和可见度还取决于太阳活动和地磁暴。
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Scientists monitor solar wind data to predict when and where auroras might be seen.科学家通过监测太阳风数据来预测极光可能出现的时间和地点。
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Some astronauts even observe auroral ovals from space as glowing rings around each pole.一些宇航员甚至从太空观测到环绕两极的发光环状极光椭圆。
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This natural light show reveals how deeply our planet connects with the Sun's dynamic atmosphere.这场自然光秀揭示了地球与太阳活跃大气之间深刻的联系。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- Earth's magnetic field guides charged solar particles toward the north and south poles. 地球磁场引导带电的太阳粒子涌向南北两极。
- Auroras rarely occur near the equator since few solar particles reach those latitudes. 赤道附近极少出现极光,因为鲜有太阳粒子能抵达那些纬度。
- Because Earth's magnetic field lines converge at the poles, most particles follow them there. 由于地球磁力线在两极汇聚,大多数粒子随之被引向那里。
④ 懂 · 选一选
⑤ 今天会说这一句
Earth's magnetic field guides charged solar particles toward the north and south poles.
⑥ 跟读并录音
Earth's magnetic field guides charged solar particles toward the north and south poles.
第一版:录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达,自己说一句。
例子:Earth's magnetic field guides charged solar particles toward the north and south poles.
已记下。连续天数以后会显示在课表里。
陈老师指导
课程开发中,敬请期待。成人和孩子都可以先自学听读、精读。
这边的讲解音轨还在做。想先跟着老师走完固定 30 课,可以去陈老师带读社(和自学通行不是同一份会员)。
课程开发中,敬请期待。