No smoking in the room
No throwing rubbish everywhere.
Everyone cleans his own room.
No spiting upon each other.我看不懂1、不准吸烟2、不准随意扔垃圾3、每人自己打扫房间4.不准恶意相向。呃.......能不能用“You shuold....","You shuold't"来回答呢？？不如这样标准因为我本来就不会吸烟啊