负面压力会引起身体发生化学反应，免疫力下降，更有可能会生病。大笑能增强免疫系统抵抗疾病的免疫力，有助于保持身体健康精力充沛。

4. Laughter promotes heart health.

笑促进心脏健康

“A sense of humor … is needed armor. Joy in one’s heart and some laughter on one’s lips is a sign that the person down deep has a pretty good grasp of life.” — Hugh Sidey

“幽默感需要武装。内心快乐笑挂嘴边是一个人深度领悟生活真谛的标志。”—休·西德尼

Laughter reduces blood pressure and improves blood flow, which will in turn reduce your odds of suffering a stroke or heart attack.

笑能降血压并改善血液循环，进而降低中风或心脏病发作的几率。

5. Laughter helps you stress less.

笑可以减压

“Laughter and tears are both responses to frustration and exhaustion. I myself prefer to laugh, since there is less cleaning up to do afterward.” — Kurt Vonnegut

“应对挫折和疲惫有哭有笑反应各异，我喜欢笑，因为笑过后至少不用清理自己。”—库尔特·冯内古特

Have you ever been so frustrated with your day that you wanted to curl up in a ball and cry? I doubt anyone can honestly say, “No,” to that question because we’ve all been there, but why not laugh instead? How happy you are in life has less to do with how you act than it does how you react (and your reaction is always a choice, so keep it positive).

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