... radioactivity standard 放射性标准 ; 放射性标准源 Discovering Radioactivity 揭示放射现象 contained radioactivity 密封放射性 ...
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radioactivity contained 围阻放射性
The bulk of the radioactivity is contained in the spent fuel, which is quite small in volume and therefore easily handled with great care.
大量的放射性是包含在乏燃料，在体积非常小，因此很容易处理。
In addition, there also existed the hybridization of the crustal substance which contained OS with high radioactivity during the formation of the sulfide nickel deposit.
煎茶岭硫化镍矿床成矿过程中有含高放射性成因锇的壳源物质混染。
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