Definition
to cultivate or arouse a strong emotional or physical state after a period of effort or duration
培養；激發
She worked up her confidence before the speech.
她在演講前培養了自己的信心。
He worked up his competitive spirit for the upcoming match.
他為即將到來的比賽激發了競爭精神。
After an hour of practice, he worked up a passion for the piece.
經過一個小時的練習，他對這首曲子產生了熱情。