The rivers of Africa bring life and abundance to their inhabitants, but they can also be the arena for some of nature's greatest challenges and dramas. Harsh seasonal cycles dictate the cour... 译文(2): 非洲的河流给它们的居民带来了生机和财富，但它们也可以成为自然界某些最大挑战和戏剧的舞台。严酷的季节周期决定了..。
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