As a result, the average annual flow of the waters in the basin amounts to just 24, 000 gigalitres a year which is the lowest rate of flow of any of the world's greatest river systems.

因此，该流域的年均水流量仅为 24000 千亿升，是世界上最大的河流系统中流量最低的。

For comparison, the Mississippi basin in the united states has an average annual flow of nearly 503, 000 gigalitres a year which is more than 22 times the flow of water that Australia's greatest river system has got.

相比之下，美国密西西比河流域的年均流量接近 503000 千亿升，是澳大利亚最大河流水系流量的 22 倍多。