pro·fi·cien·cy /prəˈfɪʃən(t)si/
精通,熟練,精練
Pro·fi·cience Pro·fi·cien·cy, n. The quality of state of being proficient; advance in the acquisition of any art, science, or knowledge; progression in knowledge; improvement; adeptness; as, to acquire proficiency in music.
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proficiency
n 1: the quality of having great facility and competence
2: skillfulness in the command of fundamentals deriving from
practice and familiarity; "practice greatly improves
proficiency" [syn: technique]