Read Edit View history 水系 shuǐxì drainage system Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 水系 · shuǐxì · drainage system 2026/03/04 水系 shuǐxì drainage system drainage system; river system 长江是中国最大的水系。 noun created sense Mar 4, 2026, 02:25 AM