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Why Do Mountains Get Snow but Nearby Valleys Stay Warm?
为什么山上会下雪,附近的山谷却很暖和?
精读先不看文字,完整听一遍。
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Air cools as it rises over mountains due to lower pressure.空气越过山脉上升时,因气压降低而冷却。
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Cold air cannot hold much moisture, so water freezes into snow.冷空气无法容纳太多水分,因此水凝结成雪。
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Valleys sit lower where air pressure stays higher and warmer.山谷地势较低,气压较高、气温较暖。
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Sunlight warms valley ground faster than mountain peaks do.阳光使山谷地面升温比山顶更快。
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Cold air also sinks, making valleys less likely to freeze at night.冷空气还会下沉,使山谷夜间不易结冰。
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That is why snow covers peaks but not the land below.因此积雪覆盖山顶,却不见于下方的地面。
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
- Sunlight warms valley ground faster than mountain peaks do. 阳光使山谷地面升温比山顶更快。
- Valleys sit lower where air pressure stays higher and warmer. 山谷地势较低,气压较高、气温较暖。
- Air cools as it rises over mountains due to lower pressure. 空气越过山脉上升时,因气压降低而冷却。
④ 懂 · 选一选
⑤ 今天会说这一句
Sunlight warms valley ground faster than mountain peaks do.
⑥ 跟读并录音
Sunlight warms valley ground faster than mountain peaks do.
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:Sunlight warms valley ground faster than mountain peaks do.
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。