如果你想一天笑40次，那就要清楚什么会使你发笑，找到能逗你笑的原因。

If you're trying to laugh 40 times daily, it's important to know what makes you laugh and have ready access to laugh-provokers.

youdao

调查发现，婴儿一天能笑300次，十几岁的孩子平均一天笑6次，而年龄超过60岁的人一天只笑2.5次。

While infants laugh up to 300 times a day, that figure falls to an average of 6 laughs a day for teenagers and only 2.5 daily chuckles for those more than 60 years old, the survey found.

youdao

youdao

He would be quite famous in his line of work. Whether Magda was his wife or not, one evening when he was wise-lined and gray at the temples he'd smile gravely, at a fashionable dinner party, and remind her of his youthful passion.

他会在他的行业中变得相当有名，不管Magda是否,成为他的妻子，等他有了智慧的皱纹，两鬓斑白了,他会有天晚上在一次上流社会的晚宴上，庄重地微微一笑,对她提起自己少年时代的钟情。

耶鲁公开课 - 1945年后的美国小说课程节选