A total of 485 zircons held inclusions, and about a dozen or so of these contained radioactive trace elements that allowed the researchers to determine their ages.
总共有485块锆石内部带有包体，其中有十几块包体中含有放射性微量元素，研究者可以根据它们来测定包体的年代。
Objective to investigate the effects of total Saponins of Paeonia on trace elements and myocardial ultramicrostructure of dog with acute myocardial infarction.
目的观察白芍总苷对急性心肌梗死犬微量元素及心肌超微结构的影响。
The result showed that the tested trace elements had different distribution in different parent material profile and soil types. Red parent material had high content of total Zn.
结果表明：红土母质中全锌含量均高于黄土母质，全铜在不同亚类、不同母质黑土中含量分布变异较小；
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