He chose Meriwether Lewis to lead the expedition team.

他选择梅里韦瑟·刘易斯带领探险队。

In 1804, he sent out a group of explorers led by Meriwether Lewis and William Clark.

1804年， 他派出以梅里韦瑟·刘易斯和威廉·克拉克为首的探险队。

So Jefferson sent a corps of explorers under the command of Meriwether Lewis and William Clark to travel up the Missouri River to find out.

因此，杰斐逊派出一支由梅里韦瑟·刘易斯和威廉·克拉克率领的探险队沿密苏里河逆流而上寻找答案。

So he chose a man named Meriwether Lewis to lead an expedition to learn more – to lead a trip that would explore this new area.

因此，他选择了一个名叫梅里韦瑟·刘易斯的人来领导一次探险，以了解更多信息——领导一次探索这个新领域的旅行。

Between 1805, when Meriwether Lewis and William Clark first traversed the continent, and the 1860s, the buffalo's numbers fell from probably 30m-60m to fewer than 15m.

从 1805 年梅里韦瑟·刘易斯 (Meriwether Lewis) 和威廉·克拉克 (William Clark) 首次穿越非洲大陆到 1860 年代，水牛的数量从大约 30m-60m 下降到不到 15m。