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Three reasons problems are inevitable; first, we live in a world of growing complexity and diversity; second, we interact with people; and third, we cannot control all the situation we face.
三个原因问题是不可避免的;首先，我们生活在一个日益复杂和多样化的世界;第二，我们与人互动;第三，我们不能控制我们面临的所有情况。