One reporter for the New York Times observed that the change from President Herbert Hoover to Franklin Roosevelt was like a man moving from a slow horse to an airplane.

VOA: special.2011.03.24

My answer is, you can't change one but you can create a new one that is almost like the old one but different in a little bit.

既然你不能改变元组,你可以新建一个跟原来的元组,大体上一致但有细微差别的元组。

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