at the ball:
在舞会上
It'll be announced tomorrow night at the ball.
在明晚的舞会上就要宣布。
They enjoyed themselves very much at the ball last night.
在昨晚舞会上他们玩得很开心。

make a deal:
订个协议
You are not going out of here unless we make a deal.
除非我们达成交易，否则你别想走出这里。
If you add a little more again, then we can make a deal.
如果您再加一点，我们就成交。