Why does exercise make us happy and calm?

为什么锻炼能让我们快乐和镇静？

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Babies thrive best when those around them are happy and calm.

宝宝最喜欢他们身边的人保持开心及平静的情绪。

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Project yourself into the future, to a moment where you are happy and calm, and then work backward, figuring out what happens along the path to serenity.

畅想一下未来，你是多么得开心和平静。 然后再开始工作，看看在通往平静的路上到底会发生什么。

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It's not as if Sweden was happy and calm and contented until last week and then, suddenly, this trouble started.

NPR: Violence In Europe Leaves People Fearful

With a breathy, calm and happy demeanor, Hecht is addictive to watch.

WSJ: Review: 'The Assembled Parties' a terrific drama

"Shane sounded very calm and content, happy to be in a beautiful environment, and made absolutely no mention of the risk whatsoever, " Meckfessel wrote.

CNN: Hikers' friend says they crossed into Iran by mistake