To be systematic, I'm going to build this tree depth-first left-first.
为了保持系统性,我将要把这棵树设置,为深度优先和左边优先。
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
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