我们经过多日的行军，来到了葛曲河。 。
长江发源于世界屋脊--青藏高原的各拉丹冬雪山西南侧，正源沱沱河，南源当曲河，北源楚玛尔河。
It originates from the Tuotuo River on the southwestern side of the snow-draped Geladandong.
探讨与香溪河具有相似纬度、相似河流长度和流域面积，同为长江上游支流的九龙河和冈曲河的大型底栖动物的群落结构特征与香溪河的差异。
The three streams had similar latitude, river length and watershed area. All were the tributaries of the Yangtse River and located in the upstream areas.
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