Radiometric techniques are not always appropriate to search for uranium deposits .

放射性方法在铀矿普查中并不总是有效的。

Relative radiometric correction for multitemporal tm images .

多时相tm影像相对辐射校正研究。

Radiometric ages of these rocks begin where the geological record in britain ends and run back an additional four billion years .

对这些岩石进行放射性定年法测定显示，它们的年龄都超过了英国岩石的地质记录并再向前追溯40亿年。

Radiometric dating has to be used cautiously , however , because it 's notoriously easy to do it wrong .

但放射性定年法使用时应当慎重，众所周知这种方法很容易得出错误结论。

In field work , high-precision and multi-parameter radiometric survey has been carried out ; in indoor work , radiome tric stations have been utilized to undertake data processing and interpretation .

在野外工作中,开展了高精度、多参数的放射性测量。在室内工作中,利用放射性测量工作站对数据进行处理和解释。