Some of the dust managed to reach North America and then fall into the Atlantic.
这个沙球的一部分可以成功到达北美然后掉到大西洋里面。
From there, it spread to the rest of northern Europe and north America.
它从那儿传到北欧的其它地区和北美洲。
The mound-building people was one of the earliest civilization to emerge in North America.
丘堆（mound-building，译注：不知官方如何翻译）民族是北美洲出现的最早的文明之一。
Traumatic dislocations of the hip appear to be on the rise in North America.
在北美，外伤性髋关节脱位似乎有上升的趋势。
Traumatic dislocations of the hip appear to be on the rise in North America.
在北美，外伤性髋关节脱位似乎有上升的趋势。
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