“pollen spectrum”的概念、定义、翻译、参考文献-科学参考

单词	pollen spectrum
释义	pollen spectrum Encyclopedia 理学花粉谱释 pollen spectrum花粉谱从地层中某个层位的单个样品中获得的不同种类的花粉、孢子的相对丰度（百分比），在一水平线上显示的棒状图或曲线图。
随便看	approximation boundary condition approximation by continued approximation by continued fractions approximation by convex sets approximation by defect approximation by diffusion approximation by excess approximation by function of complex variable approximation by interpolation approximation by least squares approximation by linear operators approximation by operators approximation by periodic transformations approximation by polynomials approximation by rational functions approximation by series approximation by splines approximation error approximation formula approximation function approximation in quadratic norm approximation in the mean approximation in the quadratic mean approximation method approximation of an equation

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