你已经虚席了时间机器的工作原理，时间机器不断的备份细小部分已使它变得巨大。

You have already learned that Time Machine works behind the scenes to "thin" your backups to keep them from being too large.

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从某种程度来说，哈佛的历史、影响力及财富已使它成为世界上最富盛誉的大学之一。

To some extend, Harvard's history, influence, and wealth have made it as one of the most prestigious universities in the world.

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但中国正在奋发图强，它的自省、自我修正和适应变革的态度已使它在过去28年里突飞猛进。

But China is trying very hard to excel. And it has registered truly astonishing progress over the past 28 years by demonstrating the capacity for introspection, self-correction and openness to change.

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