Vaal
/vɑːl/- a river of South Africa, the chief tributary of the Orange River, rising in the Drakensberg Mountains and flowing 1,200 km (750 miles) south-westwards to the Orange River near Douglas, in Northern Cape. For much of its length it forms the border between North-West Province and Free State.瓦尔河（南非一河流, 奥兰治河主要支流, 起源于德拉肯斯堡山脉, 全长1,200公里, 即750英里, 向西南在北开普省的道格拉斯附近流入奥兰治河; 该河的大部分形成了西北省和自由邦省的边界）。