1580s, back-formation from proficiency or else from Old French proficient (15c.), from Latin proficientem (nominative proficiens), present participle of proficere "to make progress, go forward, effect, accomplish, be useful" (see proficiency). Related: Proficiently.
实用例句
1. She's proficient in several languages.
她精通好几种语言。
来自《权威词典》
2. She is proficient at swimming.
她精通游泳.
来自《简明英汉词典》
3. She was very proficient in music.
她非常精通音乐.
来自《现代汉英综合大词典》
4. He proved to me that he was very proficient in driving a car.
他向我证明他开车技术非常熟练.
来自《简明英汉词典》
5. A great number of Egyptians are proficient in foreign languages.