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。

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At last, the author obtained the equation of ray trace in the GRIN ball lens with the index profile which is quadratic and drew some important conclusions.

研究了二次抛物线型的GRIN球透镜的光线轨迹方程序；得出其轨迹为椭圆曲线及一些重要结论。

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The result showed that the tested trace elements had different distribution in different parent material profile and soil types. Red parent material had high content of total Zn.

结果表明：红土母质中全锌含量均高于黄土母质，全铜在不同亚类、不同母质黑土中含量分布变异较小；

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He told jurors he left a green towel as a colour match which he said explained why police found a minor trace of DNA on the towel which matched his profile.

BBC: Danilo Restivo