proficiency
音标：
英音/ prəˈfɪʃ(ə)nsi / 美音/ prəˈfɪʃ(ə)nsi /
听听基本释意：
外刊例句：
Eager to launch his career, he left the school — now a university — before completing a set of piano proficiency exams.
由于渴望开始自己的职业生涯，他在完成一系列钢琴水平考试之前离开了学校（现在是一所大学）。
—Washington Post
The bill also proposed granting legal status based on a points system that scored immigrants according to job skills, education level, family ties and English-language proficiency.
该法案还提议根据积分制度授予移民合法身份，该制度根据工作技能、教育水平、家庭关系和英语水平对移民进行评分。
—New York Times
More than half of city students failed state reading exams last year, and proficiency rates were even lower for Black and Latino children.
去年，超过一半的城市学生未能通过国家阅读考试，黑人和拉丁裔儿童的熟练率甚至更低。
—New York Times
基本释意：
noun
the quality of having great facility and competence
熟练，精通
同义词：
technique
短释义：
Proficiency, pronounced “pro-FISH-en-cee,” comes from the Latin word proficere, meaning “accomplish, make progress, be useful.” If you have achieved proficiency in something, you have done well at gaining a skill. However, having proficiency doesn’t make you an expert. Still, proficiency is something to be proud of — it means you have worked hard, and if you keep going, you probably will become an expert.
如果你精通某件事，那么你就非常擅长。如果您精通西班牙语，您就可以用该语言很好地理解和交流。
长释义：
Proficiency, pronounced “pro-FISH-en-cee,” comes from the Latin word proficere, meaning “accomplish, make progress, be useful.” If you have achieved proficiency in something, you have done well at gaining a skill. However, having proficiency doesn’t make you an expert. Still, proficiency is something to be proud of — it means you have worked hard, and if you keep going, you probably will become an expert.
Proficiency，发音为“pro-FISH-en-cee”，源自拉丁语proficere，意思是“完成、取得进步、有用”。如果你在某件事上达到了熟练程度，那么你在获得一项技能方面就做得很好。然而，拥有熟练程度并不意味着你就是专家。尽管如此，熟练还是值得自豪的——这意味着你已经努力工作了，如果你继续努力，你可能会成为专家。
文学例句：
Some elect to be scholars, especially if they have shown proficiency in their studies, and they finally join the great army of school-masters that are required for the countless schools throughout the country.
有些人选择成为学者，特别是如果他们在学习上表现出熟练程度，他们最终加入了全国无数学校所需的校长大军。
—Sidelights on Chinese Life by Macgowan, J. (John)
For instance, although he can understand his mother tongue, and speak it fluently, he cannot read or write it with even modest proficiency.
例如，虽然他能听懂自己的母语，并且说得很流利，但他读或写的能力却很差。
—The Namesake by Jhumpa Lahiri
He became the favourite pupil and devoted supporter of Sir Robert Walpole, achieving unequalled and unenviable proficiency in the worst political arts of his master and model.
他成为罗伯特·沃波尔爵士最喜爱的学生和忠实支持者，在他的导师和榜样最糟糕的政治艺术中取得了无与伦比和令人羡慕的熟练程度。
—Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5
“Hinduism” to “Home, Earls of” by Various
词源：
proficiency (n.)1540s, “advancement, progress” (a sense now obsolete), probably from abstract noun suffix -cy + Latin proficientem (nominative proficiens), present participle of proficere “accomplish, make progress; be useful, do good; have success, profit,” from pro “forward” (see pro-) + combining form of facere “to make, do” (from PIE root *dhe- “to set, put”). The main modern sense of “degree of advancement attained in some branch of knowledge, art, science, etc.” is from 1630s.Related entries & more
下面是词源的翻译（机器翻译比较难翻，参考着看）
proficiency (n.)1540s，“进步，进步”（现在已经过时的意思），可能来自抽象名词后缀 -cy + 拉丁语 proficientem（主格 proficiens），proficere 的现在分词“完成，取得进步；成为有用的，做好事；有成功、利润”来自 pro “前进”（参见 pro-）+facere 的组合形式“制作、做”（来自 PIE 根 *dhe-“设置、放置”）。主要现代意义上的“在知识、艺术、科学等的某些领域所达到的进步程度”。来自 1630 年代。相关条目及更多
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