4. To be grateful for what you have
对已拥有的一切布满感激
A person generally smiles when he or she is content from within. If you are grateful for what you have in life, it is a good enough reason for you to smile. Be content for the things you possess in life as well as all the happiness you have received until now. If you want to show the world that you appreciate life in every way, smiling is the best way to show it.
只有当内心感到满意时，一个 人才 会露出笑容。如果你对已经拥有的一切布满感激，那么就笑吧。对已拥有的一切以及一直以来的快乐感到知足。如果你想告诉世人你是如此感激生活，笑容是最好的表示。
5. To be positive all the time
能保持乐观
Positivity is a virtue that may or may not naturally occur in everyone. While some people have inborn positivity, others may have to train their minds and cultivate it. If you want to become a positive person, you should start by keeping a positive demeanor. And the first step in doing that is to smile.
乐观是一种美德，既可能又不可能发生在每个人身上。有些人生来就积极乐观，有些人会训练自己的头脑变得积极起来。如果你想成为一个积极的人，那就开始保持一个积极的行为吧，第一步你需要做的就是露出笑容。
6. To become more approachable
增加亲和力
Being an approachable person will not only help you in your personal life but also in your professional life. One of the common signs of an approachable person is a smiling face which looks inviting. If you flash a smile to everyone you meet, they will see you as a laid-back person who is easy to approach, talk to and be friends with.
成为具有亲和力的人，能让你在个人生活和职业生活中如鱼得水。那么有亲和力的人最基本的特征就是有魅力的笑容。如果你对每个人报以笑容，他们就会把你看成是有亲和力的人，可以接近，谈天做朋友。
