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The only person you should try to be better than is the person you were yesterday.
学习是系统中产生的任何变化,这些变化或多或少会永久性地改变其适应环境的能力。
气候的变化不是一朝一夕的原因,它的由来是逐渐的。
I think people believe in heaven because they don’t like the idea of dying, because they want to carry on living and they don’t like the idea that other people will move into their house and put their things into the rubbish.