[jīng tōng]
be proficient in [at]; have a good command of; master; be good at; be familiar with; be hot in; be right down one's alley; be perfect in; be skilled in [at]; be well versed in; be practised in; be skillful at [in]; be acquainted with; have an intimate knowledge of; have a good knowledge of; have the knack of; have an intimate acquaintance with sth. [sb.]; know sth. very well; be expert in [at]; know from A to Z; be saturated with; be at home in; make oneself master of; be great at [on]; be well up in; steep in; be accomplished in; be deeply read in; be a dab at sth.; be adept in sth.; excel in; be conversant with [in]; get a thorough knowledge of; be at one's best in; be certainly A one at; attain [acquire] proficiency in; a dab hand in; be handy with [at]; old hand (at); up one's street
have a good command of English
精通英语
be proficient at an art
精通一种技艺
be proficient in one's professional work; become expert in one's own fields of endeavour
精通本职业务
She was very proficient in music.
她非常精通音乐。
If only I could be master of this subject.
我多么希望能精通这门学科。