Parenthood can and should be a source of happiness and wonderful fun.

作为父母，你可以也应该成为有趣和快乐之源。

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Say that labor is the people's basic needs is a source of happiness.

都说劳动是人的根本需要，是快乐的源泉。

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Dog owners, at least, often get more exercise, and exercise is a source of happiness.

至少来说狗主人们通常能得到更多地锻炼。锻炼也是快乐的一个来源。

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Further, where is his desire to compel the worship of a higher being, also on his list as a source of happiness?

ECONOMIST: The economics of happiness: Can't buy it? | The

We buy a sofa instead of a ski trip, not taking into account that we will get used to the sofa very quickly and that it will stop being a source of happiness, while the vacation will likely stay in our minds for a long time.

WSJ: The Art of Buying Happiness With Money | Ask Ariely

For others, economic strain, family estrangement, the pressure of others' expectations, overtaxed schedules and plain old exhaustion can mount and crush the happiness out a season that was previously a source of comfort.

CNN: A depressive's guide to Christmas