The concept of "Fragment Modem" and "Grain Index" recently put forward made the study of sandstone fragment components into practical field of macro- geology.

近年来，“碎屑模型”和“颗粒指数”概念的提出使得砂岩碎屑组分的研究进入了宏观地质学的实用领域。

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Currently, in the oil field development study, the development index prediction of oilfield block is a new hot research topic.

目前，在油田开发研究中，油田区块开发指标的预测是一个新的热点研究课题。

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A field study was conducted to determine the relationships between Crop Water Stress Index (CWSI), yield, and quality of cotton under drip irrigation with mulch.

通过田间试验，研究了膜下滴灌棉花的作物产量、品质和作物缺水指标(CWSI)定量关系。

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