You laugh once, I can be happy for several days;

你笑一次，我就可以高兴好几天；

youdao

She wanted to laugh and weep all at once.

她哭笑不得。

《柯林斯英汉双解大词典》

Every once in a while the instructor makes a witty remark, causing others in the class to laugh.

每隔一段时间，老师就会说一句诙谐的话，让班里的其他人都笑了起来。

youdao

She says if the show gets viewers to laugh once and cry once in an episode, then her team has done their job.

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Once-upon-a-laugh-track, many brands kept the humor strictly off camera, but Brand Keys has put one of those categories under the research microscope to see how humor is working in a field once thought far too serious to put in the hands of comedy: Car Insurance.

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"Some of us need to be hit on the head more than once, " he says with a laugh.

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