「play ball」很多人以為是玩球的意思，其實不然，它的真正含義是「與……進行合作」
來看例句
The family wanted him to be taken care of at home, but the insurancecompany refused to play ball.
家裡人希望他留在家裡並得到照顧，但保險公司拒絕合作。
If you play ball, we'll be able to reduce your sentence from eight years to just three.
如果你肯合作，我們將能夠將你的刑期從八年減到三年。
We need their help, but will they play ball?
我們需要他們的幫助，但是他們願意合作嗎？
「have a ball」這個表達看似很簡單，很多人以為是「有個球」，
其實不然，它的真正含義是「盡情狂歡， 過得開心」
我們來看下例句：
"So how was the party last night?"
"Oh, it was great - we had a ball!"
「昨晚的舞會怎麼樣？」
「啊，很棒，我們玩得很高興！」
The kids really had a ball at the birthday party—— they won't stop talking about it!
孩子們在生日派對上玩得很開心，他們一直在說這個事。
I plan to have a call on my vacation.
我打算度假的時候盡情狂歡一把。
Come on! Let's have a ball.
快來呀！ 讓我們盡情狂歡吧！