壳型花岗岩具较高的铅同位素比值和富铀铅贫钍铅的特点；
The crust granites have higher lead isotope ratios and are richer in uranium lead but poorer in thorium lead.
把钋或者钍放在,开一个小口的含铅的盒子里面。
So, you've got polonium or thorium sitting inside this leaded box with one opening.
自不稳定核之间存在着锕系元素，包括钍和稳定核像灌了铅，铋，爆炸性事件，如超需出示锕。
Since the unstable nuclei exist between actinides, including thorium and stable nuclei like lead and bismuth, explosive events such as supernovae are required to produce actinides.
铅同位素研究揭示，该板块富铀、钍，从而为铀矿省的形成提供了必不可少的地质前提。
The plate is enriched in U and Th revealed by Pb-isotopic study, which plays an role of essential prerequisite for the formation of U province.
铅钍石是钍石的新变种，属首次发现。
The plumbothorite discovered for the first time is a new variety of thorite.
铅钍石是钍石的新变种，属首次发现。
The plumbothorite discovered for the first time is a new variety of thorite.
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