锆英砂是一种伴生矿资源，锆英砂的开发利用会对环境产生放射性污染。
The zirconite is one of mineral resources associated with radioactivity. The exploitation and USES of zirconite would lead to pollution to the environment.
硼砂对放射性物质—铀和钍起到从锆英砂中分离的作用。
The borax plays the role of separating radioactive materials-uranium and thorium from the zircon sand.
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。
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。
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.
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