It seems likely, then, that the traditional three-stage life will evolve into multiple stages containing two, three, or even more different careers.

那么，传统的三段式生活很可能演变成包含两个、三个甚至更多不同职业的多阶段生活。

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Another study conducted over a 23-year period examined three groups of people at three different life stages and concluded that emotional happiness grew with age, she said.

她说，另一个赶过23年的研究检测了三个差别生命阶段的三类人，并总结出激情幸福跟着春秋增进。

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Three stages of life: more than talent; than the financial resources; than the realm.

人生三阶段：比才华；比财力；比境界。

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In this new study, detailed this week in the journal Nature Methods, Hufnagel and colleagues recorded the movements of every cell nucleus in the embryo not only during the later developmental stages, but also throughout the first three hours of the embryo's life, when nuclei divide very rapidly.

MSN: Fruit fly embryo grows into larva in 3-D video