Definition
To be able to do something very easily because you have done it so many times.
驗能熟能生巧
He knows the software so well, he could practically use it in his sleep.
他對這套軟體非常熟悉，幾乎可以在睡夢中使用它。
I've done this job countless times; I could do it in my sleep now.
這份工作我已經做了無數次，現在我閉著眼睛都能完成。
Her piano skills are so proficient, she could almost play in her sleep.
她的鋼琴技巧非常熟練，幾乎可以在睡夢中演奏。