用英语写出标志牌上的内容：勿折花草、来宾登记、请勿践踏草坪、请随手关门、勿乱扔废弃物（用英语哦）

1.No grass or flower picking.
2.Guest registration is required.
3.Keep off the grass.
4.Shut the door behind.
5.No littering.