"have on the ball" in Chinese (Traditional)
頭腦靈活能幹（非正式）
Definition
表示某人在處理任務或解決問題時聰明、機敏且有能力。
Usage Notes (Chinese (Traditional))
非正式用語，多見於美式英語。常跟 'have' 使用，形容既聰明又有實際能力的人。正式場合不常用。
Examples
She really has on the ball when it comes to math.
她在數學方面非常**頭腦靈活**。
If you have on the ball, you can solve this quickly.
如果你**頭腦靈活**，很快就能解決這個問題。
That new student has on the ball; he learns fast.
那位新同學**頭腦很靈活**，學得很快。
Wow, you really have on the ball—nobody else got that answer!
哇，你真的**很能幹**——沒有人答出來！
He might not talk much, but he has on the ball.
他可能不多話，但他真的**很能幹**。
Give her any challenge—she has on the ball to handle it.
給她任何挑戰——她都**能夠勝任**。