The Canadian Arctic is a vast, treeless polardesert that's covered with snow for most of the year.
加拿大的北极是一个广阔的、没有树木的极地沙漠,一年中大部分时间都被雪覆盖着。
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There, under a sun that never sets, they anchor tents against freezing winds, post lookouts for polar bears, and begin coaxing the secrets of evolution from a rocky polardesert.