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Rub' al Khali Desert Expansion in the Arabian Peninsula
阿拉伯半岛鲁卜哈利沙漠扩张
精读先不看文字，完整听一遍。
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The Rub' al Khali—the Empty Quarter—is the world’s largest continuous sand desert, covering over 650,000 km² across four countries.鲁卜哈利沙漠（即‘空旷之地’）是全球面积最大的连续沙质沙漠，横跨四国，面积逾65万平方公里。
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Satellite data shows its sandy margins creeping northward at an average rate of 15 meters per year since 2000, swallowing marginal grasslands.卫星数据显示，自2000年以来，其沙质边缘正以年均15米的速度向北推进，吞噬边缘草原。
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This expansion links closely to reduced winter rainfall from weakening Mediterranean cyclones and hotter, drier summers.这一扩张与地中海气旋减弱导致的冬季降雨减少，以及更炎热干燥的夏季密切相关。
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Overgrazing by camels and goats removes stabilizing vegetation, allowing wind to mobilize loose topsoil into shifting dunes.骆驼和山羊过度放牧破坏固沙植被，使风力得以将松散表土卷起，形成移动沙丘。
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Traditional Bedouin knowledge warns that certain lichen-covered stones once marked reliable wells—now buried under new dune fields.贝都因人传统知识曾指出，某些覆盖地衣的石头曾标记可靠水井——如今已被新沙丘掩埋。
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Desertification maps overlay groundwater decline: aquifers tapped for date orchards and dairy farms fall faster than natural recharge allows.荒漠化地图与地下水下降趋势重叠：为枣园和奶牛场开采的含水层，其消耗速度远超自然补给能力。
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Solar-powered desalination plants supply cities, but their brine outflow harms coastal ecosystems without strict dilution controls.太阳能海水淡化厂为城市供水，但若缺乏严格稀释管控，其浓盐废水会损害沿海生态系统。
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Researchers test drought-tolerant native shrubs like ghaf trees to anchor dunes and restore minimal soil structure.研究人员正试验耐旱本土灌木（如盖夫树），以固定沙丘并初步恢复土壤结构。
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Urban centers like Riyadh import food instead of expanding farmland, indirectly slowing desert encroachment on cropland.利雅得等城市依靠粮食进口而非扩大耕地，间接减缓了沙漠对农田的侵蚀。
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Slowing the Empty Quarter’s growth demands regional cooperation—not just on water policy, but on sustainable pastoralism too.遏制‘空旷之地’扩张需区域协作——不仅限于水资源政策，也包括可持续游牧管理。
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
- This expansion links closely to reduced winter rainfall from weakening Mediterranean cyclones and hotter, drier summers. 这一扩张与地中海气旋减弱导致的冬季降雨减少，以及更炎热干燥的夏季密切相关。
- Solar-powered desalination plants supply cities, but their brine outflow harms coastal ecosystems without strict dilution controls. 太阳能海水淡化厂为城市供水，但若缺乏严格稀释管控，其浓盐废水会损害沿海生态系统。
- Researchers test drought-tolerant native shrubs like ghaf trees to anchor dunes and restore minimal soil structure. 研究人员正试验耐旱本土灌木（如盖夫树），以固定沙丘并初步恢复土壤结构。
④ 懂 · 选一选
⑤ 今天会说这一句
This expansion links closely to reduced winter rainfall from weakening Mediterranean cyclones and hotter, drier summers.
⑥ 跟读并录音
This expansion links closely to reduced winter rainfall from weakening Mediterranean cyclones and hotter, drier summers.
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：This expansion links closely to reduced winter rainfall from weakening Mediterranean cyclones and hotter, drier summers.
已记下。连续天数以后会显示在课表里。
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