標題：A Global Flourishing Study Finds That Young Adults, Well, Aren’t

副標題：New data collected from more than 200,000 people across the world shows that young people aren’t as happy as they used to be.

正文：The happiness curve is collapsing. For decades, research showed that the way people experienced happiness across their lifetimes looked like a U-shaped curve. Happiness tended to be high when they were young, then dipped in midlife, only to rise again as they grew old.

知識點：U - shaped adj.

having the shape of the letter U U形的；呈U字形的

The U - shaped valley was formed by glacial erosion.（這個U形山谷是由冰川侵蝕形成的。）

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