n. travertine
The travertine gradually receives people's favour in the building curtain wall and decoration, its quality of material is loose and the intensity is also actually bad.
洞石在建筑幕墙装饰上逐渐受到人们的青睐，其质地却很疏松、强度也很低。
参考来源 - 洞石在建筑幕墙中的应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
独家大理石品种：米白洞石和伊朗红。
Exclusive marble varieties: cream travertine and red marble.
答：土耳其拥有世界上最多的大理石和洞石资源，超过三百多个品种。
Answer: Turkey has got the largest marble and travertine reserves in the world with more than three hundred different characters.
完成东、南立面洞石基础砼垫层施工；完成北、东立面洞石及草坪砖铺贴。
Completion of East and South facades hole stone base Fm construction; completion of the northern and Eastern facades hole stone and brick paving the lawn.
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