A in the formula refers to bow, that is, when smiling, the corners of the mouth become arched, and the radian extends to the corners of the eyes. S refers to a confident smile, which is obvious and makes people feel that it is a heartfelt smile. T is the dental condition, the teeth are neat and the size is in the golden ratio.
That is, from the middle to both sides, the teeth on both sides of the incisor are 6 1.8% of the size of the incisor, and the next adjacent tooth is 61.8% of the previous one; Exposed teeth should not be incomplete. F is the face, with high cheekbones, big eyes and sharp chin, and it is more beautiful to smile. W is the color of teeth. L is the condition and color of lips, preferably healthy pink.
meaning
Smiling has a feedback effect. If you smile "deeply", you will get positive feedback; The "faint" smile was not answered.
In daily social activities, especially in love, smiling is a kind of help, which not only makes people feel happy, but also serves as the basis for people to communicate and contact, bringing friendly signals to each other. It helps to strengthen contacts and maintain relationships.
At work, a good smile will not only leave a good impression on people and leaders around, but also broaden the scope of making friends, thus making people feel more happy and comfortable in the working environment.
Refer to the above? Baidu Encyclopedia-Perfect Smile Formula