v. 精炼( refine的第三人称单数 ); 精制; 使纯净; 使文雅高尚

v improve or perfect by pruning or polishing

v make more complex, intricate, or richer

v treat or prepare so as to put in a usable condition

v reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities

v attenuate or reduce in vigor, strength, or validity by polishing or purifying

v make more precise or increase the discriminatory powers of