proper face

例句：

1. 1. She always wears a proper face when she meets herboss.
   她每次见到老板时都保持着合适的面容。
2. 2. The teacher gave the student a properface by not scolding him.
   老师没有责备学生，而是给了他一个合适的面容。
3. 3.He had to make a proper face infront of his colleagues.
   他不得不在同事面前做出合适的面容。