said the man gently. "I've been with you today, and every day,almost, since--since she left us.

VOA: special.2010.05.15

I'm sorry, I don't understand since the left hand side of your equation does not equal the right hand side, isn't that discount, not price?

对不起,我不太理解,这里等式左边和等式右边,并不相等,这里应该是折扣率而非价格

耶鲁公开课 - 金融市场课程节选