natural building sand

基本解释

Natural resources as mineral water, clay, swell soil, peaty soil and building sand are also quite rich in amount.
矿泉水、粘土、膨润土、泥炭土、建筑用砂等资源也都十分丰富。
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The colours inside and on the outside of the building refer to the local natural colours of grass , sand and water.
内部颜色和建筑物的外部指的是草，沙子和水的地方自然色彩。
Radon from building materials such as granite, brick sand, cement and gypsum and the like, in particular, contain elements of natural stone and easy to release radon.
氡主要来自建筑材料，如花岗岩、砖砂、水泥及石膏之类，特别是含有放射性元素的天然石材，易释放出氡。