英汉词典

1.Spectrometry is preferably used each time extremely low concentrations and isotopic abundance are to be determined.

每当测定非常低的浓度和同位素丰度时总是首先使用无机质谱法。

2.Isotopic trace injection profile logging theory is based on isotopic tracer measurement technology.

同位素示踪注水剖面测井的理论基础是同位素示踪测量技术。

3.By analysing the isotopic composition of hydrocarbon molecules from plant waxes of the period.

通过分析该时期植物腊的碳氢分子同位素组成。

4.The isotopic signatures of most ancient limestones indicated the same process .

大多数古代石灰岩的同位素特征说明了同样的过程。

5.The variations in isotopic ratios take place on the right time scale, and they mirror those seen in modern corals, he notes.

他说，同位素比例变化所发生的时间范围恰到好处，这与在现代珊瑚中的发现保持了一致。

6.The isotopic compositions of reference materials are basic parameters for isotopic measurement.

同位素参考物质的同位素组成是同位素测量的基本参数。

7.You've got some radioactive isotopic that can spontaneously decay into some other nucleus.

我们有一些放射性同位素，这些同位素会自发变成其他的原子核。

8.This system can determine 13 isotopic peaks by single beam method.

该系统使用单束法能测定13个同位素峰。

9.The trick they used to do this was to look at the isotopic composition of the oxygen in the wood of local trees.

他们所使用的办法是观测当地树木的木材中的氧同位素组成（isotopic composition）。