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 .

面部的变化，如笑、皱眉、发怒，能迅速地提供更多的信息，由此我们能很明显的了解人们当时的心情、意图。