n.练习；实践；（医生或律师的）业务；惯例vi.实行；惯常地进行；练习；实习vt.实行，实践；执业；练习；惯常地进行 变形： 复数：practices过去式：practiced过去分词：practiced现在分词：practicing第三人称单数：practices 双语释义：n.(名词)[U]练习,实习 regular or repeated performance or exercise in order to learn to do sth well[U]实践,实际 the actual doing