Do you know that in some parts of the world, people build temporary(暂时的)hotels made of snow and blocks(大块)of ice These are known as ice hotels.
Unlike usual hotels, all the rooms in the ice hotels are made of ice. In some ice hotels, even the glasses for drinks are made of ice blocks. So they only serve cold drinks. Also, hot food is not served in the ice hotels, but guests can eat hot food at places nearby.
To keep warm, guests sleep in comfortable sleeping bags on ice blocks that are covered by mattresses(床垫)and reindeer skins(驯鹿皮).