英语释义
1
v improve or perfect by pruning or polishing
2
v make more complex, intricate, or richer
3
v treat or prepare so as to put in a usable condition
4
v reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities
5
v attenuate or reduce in vigor, strength, or validity by polishing or purifying
6
v make more precise or increase the discriminatory powers of