在中美洲和中国发现了一些城市，它们在丛林里或者流沙下面被找到，而其中居民不知去向，原因无从解释。
There are cities discovered in Central American and in China, found under the jungles or under the shifting sands, with no explanation for where the inhabitants went.
在中美洲和中国发现了一些城市，它们在丛林里或者流沙下面被找到，而其中居民不知去向，原因无从解释。
There are cities discovered in Central American and in China, found under the jungles or under the shifting sands, with no explanation for where the inhabitants went.
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