这种高寒地带的降雨，都是降雪。广大地带的冰雪融水汇集，形成几条大河，对农业帮助有限。尼罗河那么大，农业区就是入海口一小块

来源: easycity 于 2023-01-08 08:51:19 [旧帖] [给我悄悄话] 本文已被阅读：次

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