- refinement criterion
- 提纯: purification; purify; refine ...
- 判据: routh－hurwits criterion
- 提纯: purification; purify; refine; refinement◇提纯复壮 purification and rejuvenation; 提纯剂 purificant; 提纯器 purifier; 提纯塔 purifying column [tower]; 提纯油 good oil
- f判据: f-criterion
- 标准，判据: criteria
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