这些先前的研究都审查了不同的环境、社会和地理变量与某一地点所发现的语言数目之间的关系。
These prior efforts all examined the degree to which different environmental, social and geographic variables correlated with the number of languages found in a given location.
这些先前的研究都考察了不同的环境、社会和地理变量与在特定地点发现的多种语言之间的关联程度。
These prior efforts all examine the degree to which different environmental, social, and geographic variables correlated with a number of languages found in a given location.
例如，对于银行业务，一个重要的变量是地理位置。
For example, a key point of variability in Banking is geography.
本文根据线状要素地理信息表达的需要，对线状符号进行了分类，在分析了线状符号的视觉变量之后，给出了其图案单元的数据结构。
The linear symbol is classified according to the demand for symbol expressing, besides the data-structure of pattern cell of linear symbols is given combining with its visual variable.
地理学习兴趣是影响学习者学习质量的重要变量。
The interest in learning geography is important variable to affect learning quality for learners.
本文根据地理特征构造工具变量，有效地控制了变量的内生性问题。
By constructing instrument variable in term of the geographic characteristics, we efficiently tackle the problem of endogeneity in the regressions.
对控制变量法进行了阐述，并指出了如何运用该方法解决地理教学中的难点问题。
Variable-controlling approach is expounded and how to apply this approach in solving difficulties in geography teaching is indicated.
以遥感和地理信息为基础，进行森林调查因子定量估测变量的设置及主要变量因子的优选。
Confirm the setting of estimation variables of forest survey factors and Optimizing the key factors based on rs and GIS.
以遥感和地理信息为基础，进行森林调查因子定量估测变量的设置及主要变量因子的优选。
Confirm the setting of estimation variables of forest survey factors and Optimizing the key factors based on rs and GIS.
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