in/on the face的区别

on the face 例句：
Polite-smile on the face
有礼貌地带着微笑
Get the look on his face!
看他脸上的表情!
He struck me on the face.
他打在我脸上.
in the face 例句：
Imself red in the face.
那小孩儿哭叫得脸都红了.
An undistinguished face in the crowd.
在人群中未注意到的面孔
He flicked me in the face.
他轻弹我的脸.
He looked death in the face.
他镇定勇敢地面对死亡.
He looked me in the face.
他正视我的脸.