最初活动于色楞格河和鄂尔浑河流域，后迁居土拉河北。

They were first active in the Selenga and Orkhon river basins, and later moved to the north of the Tura river.

youdao

因此，在1235年，成吉思汗的儿子，窝阔台，开始在鄂尔浑河附近的一块开阔平原建造城市。

So in 1235, Genghis's son, Ogodei, began building a city near the Orkhon River, on the wide-open plains.

youdao

因此，在1235年，成吉思汗的儿子，窝阔台，开始在鄂尔浑河附近的一块开阔平原建造城市。

So in 1235, Genghis's son, Ogodei, began building a city near the Orkhon River, on the wide-open plains.

youdao