穷源溯流 qióngyuánsùliú to trace something to its source Definitions Defs Origin Strokes Stroke Words Sentences Sents 穷源溯流 窮源溯流 qióngyuánsùliú to trace something to its source To investigate the origin and development of a matter in depth
穷源溯流 窮源溯流 qióngyuánsùliú to trace something to its source To investigate the origin and development of a matter in depth
