These were: the  Orange Free State, centered around the Orange River, and the Transvaal Republic, beyond the  River Vaal.

这些是：以奥兰中心奥兰自由邦，以及位于瓦尔以远德兰士瓦共和国。

The Great Trek led the Boers to the northeastern regions of the Orange and Vaal Rivers, beyond the control of British colonial administration.

伟大涉将布尔人带到了奥兰和瓦尔东北部地区，不受英国殖民政制。

Like European-American settlers, they set out in tented wagons to establish new settlements in the fertile northeastern regions of the Orange and Vaal Rivers.

像欧洲裔美国定居者一样，他们乘坐帐篷马车出发，在奥兰和瓦尔肥沃东北部地区建立新定居点。