The river system of the Mississippi River and the Missouri River is the longest river system in North America at 3,902 miles.

密西西比河和密苏里河水系是北美最长的水系，全长3902英里。

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Bottom ground is land in the floodplain of the Missouri River.

低地指的是指密苏里河滩上的地。

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In the spring of 2011, it was the Missouri River flooding for months.

在2011年的春天，密苏里河已经泛滥数月。

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He grew up in Hannibal,Missouri on the Mississippi River.

VOA: special.2010.03.21

The latest proposal to revise the Missouri River Master Manual must be reviewed by the corps and the Clinton administration.

CNN: Missouri River destiny hangs in the balance

In August, Dr Kvamme tested this camera at Double Ditch, a prehistoric fortified settlement along the Missouri River in North Dakota.

ECONOMIST: Archaeology: What lies beneath | The

Cyclists start the ride on the banks of the Missouri River and end when they dip their wheels into the waters of the Mississippi.

WSJ: Moveable Feast: This Cycling Tour Has Bikers on a Culinary Crusade