Forced laughter can lead to a feeling of happiness.

强笑可以带来幸福感。

The human mind does not know the difference between forced laughter and real laughter.

人类的大脑分不清强笑和真正的笑之间的区别。

Science shows that even forced laughter can lead to a feeling of happiness.

科学表明，即使是强颜欢笑也能带来幸福感。

That is, honest, involuntary laughter cued people to perceive the jokes as funnier more than fake, forced laughter did.

也就是说，与虚假且不真诚的笑声相比，真诚且不由自主的笑声会让人们觉得笑话更好笑。