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The historical sense involves a perception, not only of the pastness of the past, but of its presence.
Cinema is not about morality, it's about truth.
学习是系统中产生的任何变化,这种变化或多或少会永久性地改变其适应环境的能力。
市场组合是所有投资者都应持有的唯一风险组合。