绝对年龄

然而，利用U、Th和K自然放射性年剂量计算出的某些绝对年龄的正确性仍有一些问题。

However , the validity of some of the absolute age calculated by using the annual dose of U , Th and K radiation remains to be an open question .

绝对年龄和古地磁也已得到深入研究。

Absolute age and paleomagnetism have been subjected to intensive studies .

，与先前报道的化石的UTh绝对年龄（0.1MaB.P.）

, which is different from the U-Th age given by fossils reported previously ( 0.1 MaB . P. )

时间是地球科学研究中永恒的主题之一，地层绝对年龄的确定是地质学研究最基础的命题之一。

Time is one of eternal subjects in geoscience .

另一种是绝对年龄，通过测量可靠的时间来确定样品的真实年龄。

Absolute dating involves assessing the actual age of a specimen by using some reliable measure to time .

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。

Since the technique of age measurement by using illite can yield absolute age , it has received a great attention .

通过上述研究，作者提供了确定绝对年龄的新方法，并取得了一些重要成果和认识。

Through the research , several important results have been obtained , which yield a new method to determine absolute ages . 1 .

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。

The geologic dating methods , which include the paleontology method , archeomagnetism method , and isotopic method , present absolute ages or relative ages of geologic events .

大洋钻探促并完善了大洋沉积的高分辨率的浮游生物带的建立，并确定了各个带的绝对年龄，最精细达10万年或更短；

Fiue-resolution planktonic zones of oceanic deposits have been established , modified , and correlated to the magnetostratigraphy with individual zones defined as fine as 100 000 years or shorter .

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；

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 .

裂变径迹法与放射性同位素法的优点能对地层绝对年龄进行直接估测，但对样品类型及保存程度要求较苛刻。

The common advantage of methods based on fission track or radioactive isotopes is to directly estimate the absolute ages of strata , but rigorous limits on sample type and conservation degree are required at the same time .

年轻女孩儿穿上会很漂亮，但那件衣服绝对是有年龄限制的。

On young girls it can look really great , but there is a definite age cut-off on this .

你的言谈举止绝对大于实际年龄。

You certainly act older than you are .

另外，EPS中这三种代谢物的绝对浓度看起来与年龄无关的。由于不需要年龄作为混杂变量，增加了这些标记物的潜在效用。

Further , the absolute concentrations of these metabolites in EPS appear to be independent of age , increasing the potential utility of these markers due to elimination of age as a confounding variable .