proficient
adjective uk/prəˈfɪʃ.ənt/ us/prəˈfɪʃ.ənt/
熟练的；精通的
skilled and experienced
a proficient swimmer 游泳好手
She's proficient in two languages. 她精通两门语言。
It takes a couple of years of regular driving before you become proficient at it. 得开上几年车，你才能熟练自如。