We can also obtain M2 and spatial variance at other axial positions with the help of additive lenses.
借助参数已知的附加透镜也能得到光束的M2和任意轴向位置的光束横向尺寸。
Rock mass parameters have the properties of structural and random spatial variance, which result in uncertainty of the parameters.
岩体参数具有结构性和随机性的空间变异特征，导致了岩体参数具有不确定性。
Water resource carrying capacity relates to economy, environment and other resources. It has dynamic, synthesis, spatial variance and other characters.
水资源承载能力涉及到自然资源、社会经济、生态环境等众多方面，具有动态、综合、空间差异等复杂系统特征。
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