The next step, says Saal, is to measure the hydrogen isotopic composition of the ice caps and compare it with the isotopic composition of the volcanic-glass pebbles.

下一步，萨尔说，是要测量（月球）冰帽中氢同位素的构成并将其与现有的火山玻璃卵石的同位素构成进行比较。

You are what you drink: local water leaves an isotopic mark in your hair.

人如其饮：当地水在你的毛发中留下了同位素的印迹。

Isotopic analytical techniques are experimental base of isotopic study.

同位素测试技术是同位素研究的基础。

Initial value of isotopic ratio

同位素比初生值

The isotopic abundance ratio and content are determined with isotopic mass-spectrometry.

文章用同位素质谱法测定了辐照堆元件铀的同位素丰度比和含量。

The isotopic abundance ratio and content are determined with isotopic mass - spectrometry.

文章用同位素质谱法测定了辐照堆元件铀的同位素丰度比和含量.

Eight equations computed isotopic abundance and two equations computed isotopic abundance ratio have been given.

给出八个计算丰度公式和两个计算同位素比公式.

An isotopic analysis of the grains has made that fear come true.

一项对这些颗粒的同位素分析让这种担心成真了.

The carbon and oxygen isotopic values are a function of salinity.

随着含盐度的增加，碳氧同位素值也增大。

The environmental isotopic tracer is a new technique developed in recent years.

环境同位素示踪技术是近几年新发展起来的一项新技术.