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The truth is rarely pure and never simple.
Attention is the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought.
钓鱼的人躬着身子,不是要对鱼恭恭敬敬;用虫子作为诱饵捕鼠,也不是因为喜爱老鼠。