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What Makes Lava Flow Like a River?
岩浆为什么能像河流一样流动?
精读先不看文字,完整听一遍。
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Lava is melted rock deep inside Earth, heated by pressure and radioactivity.岩浆是地球深处受压力和放射性加热而熔化的岩石。
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When a volcano opens, pressure drops and gases push lava upward.火山喷发时,压力下降,气体将岩浆向上推。
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Its flow speed depends on heat, gas content, and how runny the rock is.其流动速度取决于温度、含气量以及岩浆的黏稠度。
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Hot, thin lava moves fast like water; cool, thick lava creeps slowly.炽热稀薄的岩浆像水一样快速流动;冷却黏稠的岩浆则缓慢爬行。
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Rivers of lava can burn forests but also create new land over time.岩浆流能焚毁森林,但随时间推移也能形成新陆地。
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Scientists measure lava temperature and slope to predict its path.科学家通过测量岩浆温度和地形坡度来预测其流向。
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Sometimes lava cools and hardens into smooth ropy shapes called pāhoehoe.有时岩浆冷却凝固成光滑绳状结构,称为‘帕霍伊霍伊’(pāhoehoe)。
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Other times it forms rough, jagged blocks called ‘a‘ā — both from the same volcano.有时则形成粗糙尖锐的碎块状,称为‘阿阿’(‘a‘ā)——二者源自同一座火山。
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
- Scientists measure lava temperature and slope to predict its path. 科学家通过测量岩浆温度和地形坡度来预测其流向。
- When a volcano opens, pressure drops and gases push lava upward. 火山喷发时,压力下降,气体将岩浆向上推。
- Sometimes lava cools and hardens into smooth ropy shapes called pāhoehoe. 有时岩浆冷却凝固成光滑绳状结构,称为‘帕霍伊霍伊’(pāhoehoe)。
④ 懂 · 选一选
⑤ 今天会说这一句
Scientists measure lava temperature and slope to predict its path.
⑥ 跟读并录音
Scientists measure lava temperature and slope to predict its path.
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:Scientists measure lava temperature and slope to predict its path.
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。