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active phase of uranium
活动态铀
通过地质营力或地球排气作用带到地表被地表土壤中的可溶性盐类、有机物、黏土矿物和铁锰氧化物所捕获的元素铀。是元素铀活动态组分含量总和。
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First National Conference on Workers and Peasents Education
First National Congress of Chinese Nationalist Party
First National Education Working Conference
First National Games of China
First National Health Conference
First National Joint Performance of Modern Dramas
First National Joint Performance of Quyi Troupes
First National Organizational Work Conference of the CPC
First National Population Census
First National Symposium on Commemorative Museum Work
first nature and second nature
first Neuberg circle
first Neuberg point
first Neuberg triangle
first normal form
first normal form, 1NF
first normal stress difference
first number-class
first objects
first obstruction
first occurrence
first oocyte
first order
first-order
first-order aberration
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