实际上，没有任何理由可以假设任何这类比例常数的存在。
There is no reason, in fact, to assume any such constant proportionality.
实际上，没有任何理由可以假设任何这类比例常数的存在。
There is no reason, in fact, toassume any such constant proportionality.
灌木层中乔木树种和阳性乔灌木种类比例、相对密度和重要值均随坡位梯度从下部到上部逐渐增大。
Percentage, relative density and importance values of tree species and intolerant tree and shrub species increased while slope gradient from lower to upper.
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