| 正面 | 10438.proficiency 英 [prə'fɪʃ(ə)nsɪ]美 [prə'fɪʃənsi]     |
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| 背面 |     释义： 1、per- "through" 在这里引申为：由好的一方面through到不好的一方面，=> away；同类单词：pervert, perjury.2、per- + vers- + -e.3、literally "turn sb or sth through to the wrong way".4、该词来源于pervert的拉丁语对应词的过去分词。由此取形容词词性并引申出如今的含义。n. 精通，熟练 例句： 1. His proficiency as a surgeon is well known.他作为一名外科医生的水平是有名的. proficiency (n.)1540s, probably from -cy + Latin proficientem (nominative proficiens), present participle of proficere "accomplish, make progress; be useful, do good; have success, profit," from pro- "forward" (see pro-) + root of facere "to make, do" (see factitious)." |