proficient
US
UK proficient adj: (skilled)
SC 能力出众的 néng lì chū zhòng de
SC 精通的 néng lì chū zhòng de，jīng tōng de
She is a highly proficient lawyer.
她是一位能力非常出众的律师。
proficient in [sth] adj + prep: (skilled in [sth])
SC 熟练掌握（某种技能）
He was proficient in a wide range of practical skills.
他熟练掌握着许多不同的实用技能。
proficient in [sth] adj + prep: (language: speaking well)
SC 精通（某种语言）
She is proficient in French and German and has some knowledge of Japanese.
她精通法语和德语，还懂一些日语。