这土地因遭暴雨侵蚀及使用过度已贫瘠不堪。

Heavy rain and excessive use have impoverished the soil.

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因此，防止暴雨侵蚀是防治水土流失的关键。

Therefore, preventing rainstorm erosion is the key to control soil and water loss.

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尽管洞窟位于河谷上方的高地，但其中的宝藏还是会遭受来自抢劫者、纪念收藏家的损坏，以及侵蚀、地震和罕见的暴雨的威胁。

Despite the caves' perches, high above the river valley, the treasures inside are at risk from looters and souvenir collectors, as well as erosion, earthquakes, and infrequent but torrential rains.

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