如果你微笑、自信，你会以更积极的方式思考，而当你应对压力时你会感到更舒适。

If you smile and have confidence, you will think in a more positive way, and then you will feel more comfortable when you are coping with the stress.

youdao

例如，如果你微笑，你的声音会听起来温暖和友好，相反，如果你脸上有一个生气的表情，它会让你听起来不愉快。

For example, if you smile, your voice will sound warm and friendly, just the opposite, if you have an angry look on your face, it can make you sound unpleasant.

youdao

如果你微笑，那么你就对了。

If you're smiling, you're doing something right.

youdao

If you try to imagine a smile with no body at all, it can't be done. Why?

如果你要相信一个没有身体的微笑,那是根本做不到的 为什么呢

耶鲁公开课 - 死亡课程节选