逆流溯源 nìliúsùyuán to go back to the source Definitions Defs Origin Strokes Stroke Words Sentences Sents 逆流溯源 nìliúsùyuán to go back to the source to trace something back to its origins by going against the current
逆流溯源 nìliúsùyuán to go back to the source to trace something back to its origins by going against the current
