proficient

n. learner who has made progress入门的人，行家。
△1H.IV.2.4.18 (17): “To conclude,I am sogood a proficient in one quarter of an hour,that I candrink with any tinker in his own language during my life.”总之，只消一刻钟，我就入门成为内行，以后一辈子都能跟补锅匠一块儿喝酒，用他们的行话跟他们聊天。