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 scientific method was adopted to study the culture of Naxi in the late 19~(th) century.
用科学方法对纳西族及其文化等进行学术意义上的研究始于19世纪后期。
The present study has discovered th at soil texture had a great effect on bacterial wilt occurrence of tomato.
采用盆栽试验方法，研究了不同质地土壤条件下番茄青枯病的发生情况和土壤微生物的特征。
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