这条缓缓而流的宽阔大河就是科珀曼河。
This wide and sluggish river was the Coppermine.
youdao
铁尔河是一条宽阔，迂缓浑浊的河。
The river till was a wide, sluggish, clayey water.
穿过宽阔的密苏里河。
'Cross the wide Missouri.
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