The sediment in the Yangtze River mostly originates from the purple soil in the drainage area.
紫色土是长江及其主要支流泥沙的主要来源。
参考来源 - 不同尺度下紫色土水土流失效应分析·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： purpleness
"he was born to the purple"
"a writer of empurpled literature"; "many purple passages"
"purple tyrant"
以上来源于: WordNet
COLOR Something that is purple is of a reddish-blue colour. 紫色的
She wore purple and green silk.
她穿着紫色和绿色的丝绸。
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