To work as a translator, you need fluency in at least one foreign language.当翻译需要至少熟练掌握一种外语。He has a good grip of serveral modern languages.他熟练掌握了好几种现代语言。She has a sure command of the French language.她熟练掌握法语。He will have to be rehearsed on his part.他必须反复排练以熟练掌握自己所演的角色。He's adept in several languages.他熟练掌握数种语言。