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The essence of computational complexity is to understand the limits of what can be computed efficiently.

我相信愛(ài)和音樂(lè)改變生活的力量。

The man with a toothache thinks everyone happy whose teeth are sound. The poverty-stricken man makes the same mistake about the rich.

實(shí)現(xiàn)明天的唯一限制將是我們今天的疑慮。