Smiling instructors like Kitano claim that exercising one's smile is just like training other parts of the body.

北野和其他微笑培训师表示，训练如何微笑就和训练身体其他部位一样。

You know, you're essentially training every part of you, like physically, emotionally, and it's so worth it on the other side, because every time you do something, you get more and more familiar with it.

你知道，你本质上是在训练自己的每个部分，比如身体上、情感上， 而从另一方面来看， 这是非常值得的，因为每次你做某件事时，你都会越来越熟悉它。