adj.熟練的；精通的
n.能手
After reading this book, you will be proficient in writing. 讀完這本書，你會精于寫作。
My friend is proficient in three languages. 我的朋友精通三種語言。
She was very proficient in music. 她非常精通音樂。
用作名詞 (n.)He doesn't look like a proficient in golf. 他看起來不像是個打高爾夫球的專家。
If I had ever learnt, I should have been a great proficient. 如果我有機會學的話,我應該已經是個專家了。
adv.熟練地
