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在非洲撒哈拉沙漠以南的地区，情况尤其棘手。
The situation is especially difficult in Sub-Saharan Africa.
youdao
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撒哈拉沙漠是非洲北部一个著名的沙漠。
The Sahara is a great desert in the northern part of Africa.
youdao
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撒哈拉沙漠是非洲北部一个著名的沙漠。
The Sahara is a great desert in the northern part of Africa.
youdao