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- absolute age determination 绝对年代测定
- The determination of the absolute age of rocks,minerals and fossils, in years before the present, is the basis for the field of geochronology. 对各种岩石、矿物及化石的绝对年龄（距今以前的年数）的测定是地质年代学领域的基础。
- Absolute age and paleomagnetism have been subjected to intensive studies. 绝对年龄和古地磁也已得到深入研究。
- Age determination data indicate episodic crystallization of uranium minerals. 年龄测定数据表明，铀矿物有着不同期的结晶。
- One way to tell whether the lunar cataclysm actually occurred would be to determine the absolute age of the SPA basin. 想判断月球灾难是否曾发生的方法之一，就是确定SPA盆地的绝对年龄。
- Since the technique of age measurement by using illite can yield absolute age,it has received a great attention. 利用伊利石测年确定油气成藏期,能够得出其绝对年龄,因而受到人们重视。
- This study deals with age determination and age distribution of muskrat populations. 利用新疆等地区的597号麝鼠头骨标本和其它材料,研究种群年龄组成。
- In conclusion, both of the diameters and numbers of statoconia may not be appropriate index in age determination of hagfish. 由以上结果总结, 盲鳗耳石的直径与数量并不适于作为盲鳗定龄的型值。
- Personal identification,as one of the most important tasks of medical jurisprudence,includes stature estimation,sex estimation and age determination. 个人识别在法医实践中占有重要地位,主要包括判定种族、推断身高、判定性别和推算年龄。
- For the regional tectonic stability, several methods were used to investigate the geology and topography, determine absolute age, monitor present activity and microseismicity of the project region. 对区域构造稳定性采用了地质地貌调查及绝对年龄测定、现今活动状况长期监测及坝区微地震监测等方法;
- In 1992, colleagues and I were invited to Longgupo to provide a reliable age determination and to help understand the palaeoanthropology. 1992年，我的同事们和我应邀到龙骨坡提供精确的断代，并帮助解释其在古人类学上的性质。
- In this thesis the progression of the study of lumbar vertebrae in stature estimation, sex estimation and age determination were discussed. 本文着重从身高推算、别判定和年龄判定三个方面综述了近年来腰椎在法医人类学领域的研究进展。
- Scientists, however, know the absolute ages of only the basins that were visited by the Apollo and Luna missions. 不过，科学家只知道阿波罗和月球号任务造访过的盆地确实年龄。
- In order to enhance the accuracy of skeletal age determination, further investigation for appropriate methodology should be undertaken. 因此，为了提高骨龄鉴定结论的精确度，还需进行更多方法学的研究。
- In the present work, we examined the statoconia in the inner ear of the hagfish Paramyxine nelsoni intense to explore it as a useful index in hagfish s age determination. 本研究以纽氏副盲鳗为材料,检视存在于其内耳的耳石是否可能成为为盲鳗定龄的依据。
- The geologic dating methods, which include the paleontology method, archeomagnetism method, and isotopic method, present absolute ages or relative ages of geologic events. 前人已建立的地质定年方法(同位素法、古生物法和古地磁法)给出的是地质事件的“绝对年龄”或“相对年代”。
- In the present work, we examined the statoconia in the inner ear of the hagfish Paramyxine nelsoni intense to explore it auseful index in hagfish’s age determination. 本研究以纽氏副盲鳗为材料, 检视存在于其内耳的耳石是否可能成为为盲鳗定龄的依据。
- Conclusion Our study seems to be feasible in establishing the estimation standard for skeletal age determination using developmental metaphysis and anthropometry. 结论根据发育等级特征及测量学方法建立骨龄评估标准可行，可望得到推广。
- Problems existed in the Antarctic krill age determination were introduced and the methods used in the krill population age structure analysis were reviewed. 本文对国际上有关南极磷虾（Euphausiasuperba）的寿命和年龄鉴定研究的现状、研究过程中所存在的困难和问题进行了分析和探讨，对各种不同的磷虾年龄鉴定方法的特点和存在的问题进行了评述
- By the known data of isotope age determination, Nanhuaian time-structure frame was principally set up with the top boundary about 700 Ma and bottom about 800 Ma. 综合已有同位素测年数据，初步建立起南华纪年代构造格架，确立南华纪底界年龄为800 Ma左右，顶界年龄为700 Ma左右。
