The radioelement content of certain material is higher, when its intensity and radiation dosage exceed certain limit, can cause a harm to human body.
某些材料的放射性元素含量较高，其强度和辐射剂量超过一定限度时，就会对人体造成危害。
The radioelement content of certain material is higher, when its intensity and radiation dosage exceed certain limit, can cause a harm to human body.
某些材料的放射性元素含量较高，其强度和辐射剂量超过一定限度时，就会对人体造成危害。
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