之后，你可以重复它直到达到你想要达到的程度。
Later, you can iterate on the habit until it's at the level you really want.
格雷厄姆教练知道，只有一种方法可以教会孩子如何让它变得更强：你给他们做不到的事情；他们努力练习，直到发现自己可以做到，而你只需要不断地重复。
Coach Graham knew there was really only one way to teach kids how to make it stronger: You give them something they can't do; they work hard until they find they can do it, and you just keep repeating.
学习一个概念绝不容易，但一但你真正理解了它，知识便可以重复利用。
It's hard to learn a concept, but once you understand it, that knowledge can be applied repeatedly.
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