Based on the U-series dating of intercalated speleothem formations, the chronology of several hominid sites in southern China has been studied.
本文对采自云南呈贡龙潭山1号洞和广西土博咁前洞晚期智人遗址的动和洞穴次生碳酸岩样进行了铀系年代测定。
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Today's tests still work by measuring HCG. But, throughout the 20th century, other methods were explored; the AZ Pregnancy Reaction Test popped up in 1928 and was the first of several " bioassays" or animal-based tests.
今天的试仍然通 HCG 起作用。 但,在整个 20 世纪,人们探了其他方法;AZ 妊娠反应试于 1928 年, 多项“生物定” 或基于动物的试中的第一项。