A sophisticated and technologically advanced urban culture is evident in the Indus Valley civilization.
一种久经世故和技术先进的城市文化明显地出现在印度河流域文明里。
The Indus Valley civilization appears to have collapsed because natural disaster altered the course of the Indus River.
印度河流域文明看来是因为自然灾害，使得印度河改变了河道而倒塌。
The Indus Valley civilization appears to have collapsed because natural disaster altered the course of the Indus River.
印度河流域文明看来是因为自然灾害，使得印度河改变了河道而倒塌。
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