In large scale field surveys, multistage sampling is applied because the situations are complex and there are many influencing factors.

大规模现场调查，由于情况复杂、影响因素多，往往采用多阶段混合型随机抽样方法。

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Well and fracture spacing are two subsurface challenges that have the largest impact on net present value in large-scale field development of unconventional Wells.

井间距和裂缝间距是地下所面临的两大挑战，对大规模非常规井油田开发的净现值影响最大。

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Existing studies are mostly speculative logic of experience and lack large-scale field research.

现有的研究多是对经验的逻辑思辨，缺乏大范围的实地调查研究。

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The Culture for Development Indicator Suite (CDIS) provides a timely response to these challenges, building on the current favourable political context, greater capacity for data collection, and the critical mass of field experiences from large-scale projects.

UNESCO: Culture for Development Indicators

Lundin also believes that large-scale digitization of all tissue samples will also allow for the development of a whole new field of image-based analysis methods.

FORBES: The Socialization of Microscopes