polar bear populations翻译

polar bear populations的基本解释

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北极熊种群：指生活在北极地区的北极熊的总体数量。

例句

Modern methods for tracking polar bear populations have been employed only since the mid-1980s, and are expensive to perform consistently over a large area.跟踪北极能种群的现代方法仅在20世纪80年代中期才被采用，而且，要在大范围内连续采用这种方法，其代价非常高昂。
Other polar bear populations could survive beyond that date but many of those could be gone by 2100, Amstrup said.阿姆斯特拉普说，其他的北极熊会活过2050年，但这些活下来的熊中许多不会活过2100年。
In most sections of the Arctic where estimates are available, polar bear populations are thought to be stable at present.在估量是可获得的Arctic的大都局部，北极熊群当前被以为是不变。
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