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《河狸的建筑奇迹：自然工程师的生态智慧与生存之道》皇上的龙棍太长了
2025-11-09 04:12:19
A story about several beaver families in their wild surroundings. The interesting process of building a dam can be watched as well as the dangers arising from hungry bears and other influences on the new-built home.
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