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A method of solution is perfect if we can foresee from the start, and even prove, that following that method we shall attain our aim.
如果我们从一开始就能预见,甚至证明,遵循某种方法我们将达到我们的目标,那么这种解决方法就是完美的。
种树的最佳时间是20年前,第二好的时间是现在。
The things we don’t say shape us as much as the things we do.