restroom,rest-room和rest room三者有什么区别?

都是厕所。restroom restroom D。J。rest?ru:m,m] K。K。st?rum,m] n。公用厕所;盥洗室;卫生间 Where is the restroom?洗手间在哪里?The restroom is at the end of the hallway to the right。洗手间在走廊尽头右转的地方。rest room rest room n。(公共建筑物内的)公用厕所,洗手间,休息室