The babies begin to hatch! The mother penguin returns just in time to see her baby come out of its egg.

企鹅宝宝开始孵化！企鹅妈妈回来的时候正好看到她的宝宝从蛋里出来。

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To begin with, the favoured generation is in its childhood; countries have lots of children and fewer surviving grandparents (who were born at a time when life expectancy was lower).

一开始，当这得天独厚的一代处于童年时期时，各国有大量儿童，在世的祖父母数量相对较少（他们出生的年代平均寿命较低）。

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About this time every year, with the fall marathon season at its zenith, racers in training begin to hear the refrain, "you are going to ruin your knees."

每年在这个时候，秋季马拉松热闹非凡，参加长跑训练的人开始听到一句告诫：“你会伤害到膝盖的。”

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Unless you understand their business very well, its probably a good time to step aside until the analysts who are experts here begin seeing greater profits down the road.

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