n.熟練；精通
He made little proficiency in literary accomplishments. 他在文學(xué)方面成就不多。
How do you think of your proficiency in written and spoken English? 你認(rèn)為你的書面英語(yǔ)和口語(yǔ)熟練程度如何?
You need some proficiency in book - keeping for this job. 干這項(xiàng)工作你需要在記帳方面熟練。
