Meriwether Lewis and William Clark led the expedition.

刘易斯和威廉·克拉克带领的。

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Lewis, in turn, asked a friend, William Clark, to join the team in its trip across what is now the northwestern part of the U. S. mainland.

刘易斯又邀请朋友威廉·克拉克加入考察队，开始了穿越如今美国本土西北部的行程。

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Lewis, in turn, asked a friend, William Clark, to join the team in its trip across what is now the northwestern part of the U. S. mainland.

刘易斯又邀请朋友威廉·克拉克加入考察队，开始了穿越如今美国本土西北部的行程。

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