Frowns , scowls and grimaces all push people away -- but a smile draws them in .
愁眉苦脸只会把人推开,而微笑却把人吸引过来。
Providing more immediate information are the changes in a person 's face , such as smiles , frowns or scowls . These changes provide us with the most obvious information about someone 's mood or immediate intentions .