confluences
n.
（河流的）汇合处( confluence的名词复数 );
汇流处;
（事物的）汇合;
汇流;
例句:
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Channel confluences are common in natural rivers and much hydraulic engineering.
水沙交汇区在天然河流和水利工程中广泛存在着.
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The territories all centred on areas where rivers came together, confluences, which give the lions living there an advantage.
来自BBC