人不牺牲就不会得到收获。
玛丽: Yes,you are right.To get harvest, one should pay the same price.
你说得对。要得到收获，就要付出收获同等的代价。
艾尔: This is the basic principles of alchemy - equivalent to the exchange.
这就是炼金术的基本原则—等价交换。
玛丽: I can't agree with you any more.
我非常同意你的说法。