最高大的树原产于北美，但大树遍布全球——从热带到高纬度的北方森林。

The mightiest are native to North America, but big trees grow all over the globe, from the tropics to the boreal forests of the high latitudes.

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就位于这些纬度的这一地区来说，年总降水量300毫米似乎少了一些。

The annual total rainfall of 300 mm seems somewhat low for the region at these latitude.

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领头研究员皮尔斯说：“我们发现纬度的高低和眼窝及头颅的大小成正比。”

Lead author Eiluned Pearce said: "We found a positive relationship between absolute latitude and both eye socket size and cranial capacity."

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