23 篇文章
that for most of the year they would be unable to cross it.
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that for most of the year they would be unable to cross it. 它们一年中大部分时间都无法穿越这里

To get there, they have to cross the Sonoran desert.
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To get there, they have to cross the Sonoran desert. 要想到达那里 它们必须穿越索诺兰沙漠

they must cross the Himalayas.
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they must cross the Himalayas. 它们必须跨越喜马拉雅山脉