光头强的动画片每日文学解说

这四个词到底怎么分的，都快晕了，希望各位大神帮忙解答，不胜感激Lavatory more used in old western culture　　Toilet is more commonly used by everyone　　Washroom more used in America at road house or gas station　　Restroom for relaxing room with toilet 　　All these words started from term water closet when outside toilet was put inside a home and on drawing house design endorsed WC。