1.
isotopic age determination
同位素地质年龄测定
2.
Its diameter is about3000 meters, and the depth is250 meters.
它的直径约3000米，深约250米；据同位素地质年龄测定约七千万年。
3.
Various geochronometric methods have been applied to dating of important geologic events in complex Archean terranes.
在复杂的太古代地体的重要地质事件定年中已采用了多种地质年龄测定方法。
4.
DETERMINATION OF ~(129)I AGES FOR GROUNDWATER WITH SUPERSENSITIVE ACCELERATOR MASS SPECTROMETRY(AMS)
超灵敏加速器质谱计测定地下水~(129)Ⅰ年龄方法
5.
Dental age assessment using Demirjian's method on Chengdu children aged from eight to sixteen
Demirjian法测定成都地区8～16岁青少年牙龄
6.
Fission track dating of Cenozoic strata in Linxia Basin
临夏盆地新生代地层裂变径迹年龄测定
7.
fission track dating method
裂变径迹法年龄测定
8.
radiocarbon 14 dating method
放射性碳14测定年龄法
9.
Determination of the Ore-forming Age of Gold Deposits in Xiaoshan, Western Henan and Its Geological Significance
豫西崤山地区金矿成矿年龄的测定及其意义
10.
An Investigation on Thermoluminescence Dating of the Step Terrace Sediments of Guangdong Coastal Rivers
广东沿海河流阶地沉积物热释光年龄测定研究
11.
The chronology of the earth's history as determined by geologic events.
地质年代学以地质事件测定的地质历史年代学
12.
Rb-Sr AGE DETERMINATION ON THE LATE ARCHEAN FERROSILICEOUS ROCK SERIES IN SIJIAYING,LUANXIAN,HEBEI
河北滦县司家营晚太古代铁硅质岩系的铷-锶同位素年龄测定
13.
Measurement of Proton Magnetic Resonance Spectroscopy in Hippocampus of Normal Adults of Different Age Groups
正常成人不同年龄组海马氢质子磁共振波谱测定
14.
Measurement of geologic time, as through isotopic radioactive decay.
地质年代测定通过放射性同位素衰变来测定地质年代
15.
It was dated by the potassium-argon method to 1. 8 million years old.
由钾―氩法测定其年龄为180万年。
16.
The geologist theorized brilliantly about the age of the earth.
这地质学家出色地导出有关地球年龄。
17.
Geologists have calculated the age of the earth.
地质学家已经计算出了地球的年龄.
18.
Detection of uranium is needed to determine the accurate age of this star.
检测铀则需要准确判定年龄这颗恒星.