令人惊讶的是，干旱地区拥有着世界上最大的一些河流系统，如澳大利亚的墨累-达令河、北美的里奥格兰德河、亚洲的印度河和非洲的尼罗河。
Arid lands, surprisingly, contain some of the world's largest river systems, such as the Murray-Darling in Australia, the Rio Grande in North America, the Indus in Asia, and the Nile in Africa.
一些流域是主要的粮食产地，如科罗拉多河，墨累达令和印度河，这些河已经流不到大海了。
The rivers that water some of the world's breadbaskets, such as the Colorado, Murray-Darling and Indus, no longer reach the sea.
墨累河及其主干支流达令河的流量在1月至3月间创下了117年来的最低水平。
The volume of water flowing into the Murray and its main tributary, the Darling, between January and March was the lowest in 117 years.
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