This paper took Huimin county for example analysis soil nutrient balance and spatial-temporal variability for more understanding spatial-temporal variability of soil nutrient on the grain crop region of county.
为了进一步了解县级区域粮田土壤养分的时空变异特征,以山东省惠民县为例,研究了20年来惠民县农业土壤养分循环、平衡与时空变异特征的关系。
参考来源 - 县级区域粮田土壤养分空间变异特征评价研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Because of the spatial-temporal variability and inhomogeneity of natural factors and the uncertainty of human activities, runoff and sediment yielding is a complicated nonlinear process.
由于自然因素的时空变异性和不均一性以及人类活动的不确定性，因此产流产沙是一个复杂的非线性过程。
Due to the strong spatial inhomogeneity and temporal variability of atmosphere, especially water vapor , accurate modeling of path delay in GPS signals is necessary for high -accuracy position.
由于大气分布不均和不断的变化，尤其是大气中的水汽影响，使建立无线电信号路径延迟的精确模型在GPS高精度定位中非常必要。
The results of our study showed, that there was a strongly spatial and temporal variability in the sward height and herbage allowance.
试验结果表明，黑麦草草地草皮高度和牧草供给量均具有明显的时空异质性。
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