There are a number of different kin【英语翻译学习网(enfanyi.com)免费英语学习网站 快速提高英语读说听写能力】ds of building stone.Limestone is popular because it is hard,lasts a long time,and is easy to cut and shape.It is often placed over rough surfaces to make them more attractive.Marble is the most beautiful building stone.Unlike limestone,it is very colorful.It is not usually used in buildings because of its expense.Granite is even stronger and harder than limestone and is used most often for public buildings.However,it is hard to cut and handle.Like marble,granite can be polished to a shiny finish.Granite,limestone,and marble are just three of the many different building stones used today.
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