意思1.反覆演练、钻研。【组词】:温习、研习
意思2.积久养成的惯性行为。【组词】:旧习、恶习、积习难改
意思3.时常,常常。【组词】:习闻、习见
n.:custom, habit, practice、v.:practise; study; exercise; review; getaccustomedto, beusedto, becomefamiliarwith