Read Edit View history 回采 huícǎi extraction Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 回采/回採 · huícǎi · extraction 2026/03/04 回采 / 回採 huícǎi extraction the process of extracting ore or minerals from a mine, specifically through stoping or retreat mining methods 这里的煤层回采率达到了百分之九十。 created sense Mar 4, 2026, 02:25 AM