泾渭分明[jīng wèi fēn míng]
词典be quite distinct from each other：泾渭分明。
词典as different as the waters of the Jinghe and the Weihe：泾渭分明。
词典entirely different：差得多；泾渭分明；截然不同；大有区别。
词典make a clear distinction between purity and impurity：泾渭分明。
泾渭分明[jīng wèi fēn míng]
be quite distinct from each other; as different as the waters of the Jinghe and the Weihe; entirely different; make a clear distinction between purity and impurity
1. in sharp contrast：9. 残忍的 cruel | 10. 泾渭分明 in sharp contrast | 11. 一目了然 make the difference clear at first glance
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2. clear-cut：温厚儒雅 pacific | 泾渭分明 clear-cut | 和睦共处 live in harmony