这种印象来自于一种以年龄为中心的角度，从这个角度我们把自己的年龄当做最正常的时段，是所有的生命应该有的样子。

It stems in part from an age-centered perspective, in which we view our own age as the most normal of times, the way all life should be.

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所有的飞机师，其表现在某种程度上按照年龄增长而衰退。我们每个人都有类似的退化反应。

For all of the pilots, performance declined somewhat as the years passed. A similar decline with age is common in all of us.

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按照我们的模型，性别，年龄，身高和美容广告的喜好，所有的工作技能需求上升变得不那么普遍。

Consistent with our model, advertised preferences for gender, age, height and beauty all become less prevalent as job skill requirements rise.

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