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1·The oxygen isotope ratio of the ocean changes as a great deal of water is withdrawn from it by evaporation and is precipitated as snow to form glacial ice.

随着大量的水通过蒸发被抽离，并以雪的形式沉淀形成冰川冰，海洋中氧同位素的比率就发生了变化。

2·The isotope ratio is directly used for comparing oils or gases.

同位素比率直接用于比较各种石油或天然气。

3·But the team found that on the Moon it was about 25 times that of the terrestrial chlorine isotope ratio.

但是研究团队发现在月球上氯的同位素的比率大约是地球上的25倍。

4·The subsequent plankton bloom sucked up the 12c and the isotope ratio veered off in the opposite direction.

随之而来勃发的浮游生物吸走了12c，碳同位素比率转向相反方向。

5·The technology of stable C, N isotope ratio is an effective method for geographical origin traceability of beef.

利用稳定性碳、氮同位素技术是用于牛肉产地溯源的有效方法。

6·Sulfur isotope ratio of environmental sample can provide detail information regard to origin and transport of sulfur in the environment.

环境样品的硫同位素比值能够提供硫的来源及其在环境中扩散迁移的相关信息。

7·Furthermore, the background correction during the oxygen isotope ratio measurement with MAT-CH5 mass spectrometer was chosen as an example.

而且以MAT - CH_5质谱计测量氧同位素比时的本底校正作为例子。

8·The ratio of the silver-109 isotope to silver-107 turned out to be much higher in New World silver than in the European COINS.

109同位素银和107同位素银在新世界银的比例要比来自欧洲的银币高很多。

9·The surface hydrocarbon anomalies in the area was caused by oil and gas activities in deep part, according to the analysis and judgement using the carbon isotope and hydrocarbon ratio.

根据甲烷碳同位素法和烃类比值法分析判断该区地表烃类异常主要由深部油气活动所产生。

10·The isotope shifts, hyperfine structure, spontaneous emission branch ratio of the first excited level and Doppler width of the atom vapor beam were measured using laser induced fluorescence.

采用原子蒸气束激光诱导荧光法测量钆原子的第一激发态的同位素位移及超精细结构、原子跃迁自发辐射的分支比和原子蒸气束的多普勒宽度。