Extreme care must be taken to the selection of the empirical constant.
必须特别注意这个经验常数的选择。
Extreme care must be taken to the selection of this empirical constant.
必须特别注意这一经验常数的选择。
Moreover, the relationship between dielectric constant and soil water content for two types of soil different from three empirical models due to organic matter or bulk density.
由于有机质或容重等因素的影响，另外两种土壤介电常数与含水量的关系与上述三个模型差别较大。
Moreover, the relationship between dielectric constant and soil water content for two types of soil different from three empirical models due to organic matter or bulk density.
由于有机质或容重等因素的影响，另外两种土壤介电常数与含水量的关系与上述三个模型差别较大。
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