「精通」

(pos:動詞)
<explanation>
yue:某方面特別叻；非常擅長
eng:to be proficient in; to master; to have a good command of
<eg>
yue:精通英文同日文 (zing1 tung1 jing1 man2 tung4 jat6 man2)
eng:to have a good command of English and Japanese