have a good command of something
成語所屬單字command
have a good command of something — 慣用語
1. to know a lot about a subject or be very skilled at using something, such as a l
1.慣用語
釋義
精通某事物；嫻熟掌握某事物
to know a lot about a subject or be very skilled at using something, such as a language or instrument
例句
To get the job, you need to have a good command of written and spoken English.
Diego has a very good command of the violin for someone who has only been playing for three years.