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对一项神圣事业的信仰相当程度上替代了已经失去的自信。
Faith in a holy cause is to a considerable extent a substitute for the lost faith in ourselves.
Every frame counts, every second matters.
The deep, personal material of the latter half of your life is your children. You can write about your parents when they're gone, but your children are still going to be here, and you're going to want them to come and visit you in the nursing home.
The concept of computational efficiency is central to the design of learning algorithms.