face-to-face, face to face
face-to-face用作定语，意为“面对面的”，“当面的”。如：
We must have a face-to-face struggle against the enemy. 我们必须同敌人进行面对面的斗争。
face to face作状语，意为“面对面地”，“当面”，“面临着”。如：
I met her face to face at the gate. 我在门口碰见了她。
We want to discuss his problem with him face to face. 我们想和他当面讨论他的问题。
face, appearance, look
face意为“脸，面”，指人头部从前额到下颌，也可指“相貌，表情”。如：
The little girl has a lovely round face. 那小姑娘有张可爱的圆脸。
The headmaster spoke with a serious face. 校长讲话时，表情严肃。
appearance主要指外表，包括相貌、衣着、仪表。如：
We must not judge a person by appearances (=looks). 我们决不可以貌取人。
He had an unhealthy appearance. 他面带病容。
look意为“表情，脸色，外观，外表”时，是非正式用语；作复数用时，意为“容貌，美貌”。如：
There is an angry look in his eyes. 他眼中带着忿愤的神情。
The old building has been given a new look. 这幢古建筑已修复一新。
My hometown has put on a new look. 我家乡已换上了新的面貌。
She is beginning to lose her looks. 她的容颜渐老。
She was famous for her looks in the small town. 她的美貌在小镇上出了名。
factory, plant, works, mill
