have at the tips of fingers 同义词

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great hot wise savvy proficient adept acquainted front-line well-versed conversant versed up knowledge grip proficiency mastery familiarity mastership conversance know understand master acquaint be a master of have at finger tips au fait have at fingers' ends have at fingers' tips have at fingertips be adept in be learned in be at home in be proficient in have a light hand with on to

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