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Sahara: From Green Pastures to Sand Sea
撒哈拉：从青翠牧场到沙海
精读先不看文字，完整听一遍。
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Around 10,000 years ago, the Sahara was covered with lakes, grasslands, and grazing animals.约一万年前，撒哈拉地区遍布湖泊、草原和食草动物。
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Rock paintings in Algeria and Libya show giraffes and cattle, evidence of a much wetter climate.阿尔及利亚和利比亚的岩画描绘了长颈鹿和牛，证明当时气候湿润得多。
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Changes in Earth’s orbit gradually reduced summer monsoon rains reaching North Africa.地球轨道变化逐渐削弱了抵达北非的夏季季风降雨。
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Dust from the Sahara travels across the Atlantic, fertilizing the Amazon rainforest with iron and phosphorus.撒哈拉沙尘横跨大西洋，为亚马孙雨林输送铁和磷等养分。
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Today, oases support date palms and small farming communities where groundwater remains accessible.如今，绿洲依靠可获取的地下水，支撑着枣椰树种植和小型农耕社区。
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Solar farms in Morocco and Egypt now harness the region’s abundant sunlight for clean electricity.摩洛哥和埃及的太阳能电站正利用当地丰富的阳光发电，提供清洁能源。
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Sand dunes move slowly over time, burying ancient trade routes and forgotten settlements.沙丘缓慢移动，掩埋了古老的贸易路线和被遗忘的聚落。
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Scientists drill lake sediments to reconstruct past rainfall patterns and understand future drying trends.科学家钻取湖相沉积物，以重建过去降水模式并研判未来干旱趋势。
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
- Changes in Earth’s orbit gradually reduced summer monsoon rains reaching North Africa. 地球轨道变化逐渐削弱了抵达北非的夏季季风降雨。
- Today, oases support date palms and small farming communities where groundwater remains accessible. 如今，绿洲依靠可获取的地下水，支撑着枣椰树种植和小型农耕社区。
- Sand dunes move slowly over time, burying ancient trade routes and forgotten settlements. 沙丘缓慢移动，掩埋了古老的贸易路线和被遗忘的聚落。
④ 懂 · 选一选
⑤ 今天会说这一句
Changes in Earth’s orbit gradually reduced summer monsoon rains reaching North Africa.
⑥ 跟读并录音
Changes in Earth’s orbit gradually reduced summer monsoon rains reaching North Africa.
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：Changes in Earth’s orbit gradually reduced summer monsoon rains reaching North Africa.
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。