泝源 sùyuán to trace back to the source Definitions Defs Origin Strokes Stroke Words Sentences Sents 泝源 sùyuán to trace back to the source To investigate the origin of something; to trace a river upstream to its source. Cross-References Synonym 溯源 sùyuán
泝源 sùyuán to trace back to the source To investigate the origin of something; to trace a river upstream to its source. Cross-References Synonym 溯源 sùyuán
