So even though we're not literally throwing RAM away, we're not physically moving anything, conceptually, we have to go through memory in this order back to back to back and then undo it.
即使我们没有把内存依次扔掉,我们物理上没有移动任何东西,概念地,我们必须按照顺序经过内存,回到这里然后撤销它。
哈佛公开课 - 计算机科学课程节选
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模块上移
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