The poison element of ceramic ornamental materials and its changes of the limit allowed is described, and its research tendency and realistic state is summed up.
对陶瓷装饰材料中有毒害元素和其允许限定值的变迁进行了论述，归纳了其研究动向与现实状况。
It concerns a cat that is sealed inside a box for one hour along with a radioactive element and a vial of deadly poison.
内容是：一只猫被封闭在一个盒子里一个小时，和它一起的还有一些放射性元素和一瓶毒气。
It concerns a cat that is sealed inside a box for one hour along with a radioactive element and a vial of deadly poison.
内容是：一只猫被封闭在一个盒子里一个小时，和它一起的还有一些放射性元素和一瓶毒气。
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