单词：prairie dog
prairie dog的用法和样例：
例句
- The white-tailed prairie dog inhabits higher altitudes, hibernates, and is less colonial.白尾草原犬鼠栖息处海拔比黑尾种的高，有冬眠习性，较少集群。
- Introduced to the U.S. a century ago, it is creeping into the upper Midwest, wiping out prairie dogs and threatening the black-footed ferret, one of North America's rarest species.一个世纪前，鼠疫杆菌入侵美国，逐渐蔓延至整个中西部，经草原犬鼠的传播，对北美最濒危的黑脚貂造成威胁。
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