The first reason is that the two generations have grown up in different ages, thus they have different attitudes toward life.

第一个原因是这两代人是在不同时代长大的，所以他们对生活的态度是不同的。

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They observed children of different ages in each picture.

他们在每张照片中观察不同年龄的孩子。

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People of different ages and genders show affection in different ways.

不同年龄和性别的人表达感情的方式不同。

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And his discoveries that-- they did them in different ways at different ages led to the emergence of the Stage Theory.

他发现,儿童在不同的年龄拥有不同的行为方式,他根据这一发现提出了阶段理论

耶鲁公开课 - 心理学导论课程节选

So claims that--about the failure of conservation in children at different ages could be easily tested and systematically tested, and in fact, there's a lot of support for them.

关于不同年龄阶段的儿童,缺乏守恒概念的论断,能够很轻易的得到系统的检验,事实上,有相当多的证据支持这些论断

耶鲁公开课 - 心理学导论课程节选

Examiners will struggle too, to produce a single test that measures the same level of ability in children of different ages. (In music tests all candidates for a given grade play the same pieces: in an English test, quite different reading texts and writing topics would suit an eight-year-old than an 11-year-old.) The changes might even have the perverse effect of making children sit more tests.

ECONOMIST: School examinations

He and two other siblings were fostered by three different families, and Mr Galili recalls with evident pain that he grew up in 17 different places between the ages of five and 18.

ECONOMIST: Contemporary dance

The antique machines of different ages came together in a hurtling form, savage and beautiful and strange.

NEWYORKER: Joyful Noise