a good command of 精通
have a good command of 精通
She has a good command of the Spanish language.
她精通西班牙语。
《牛津词典》
Applicants will be expected to have (a) good command of English.
申请人必须精通英语。
A good command of English and Computing is a must as far as the position is concerned.
这个职位要求英语和计算机良好。
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