crop composition and distribution 作物布局
composition and distribution 组成与分布
element composition and distribution 元素组成与分布
species composition and distribution 种类组成及分布
organic composition and distribution 有机质组成分布
composition and distribution character 组成及分布特征
elemental composition and distribution 元素组成与分布
The distribution and composition of domestic acidic crudes were introduced.
介绍我国含酸原油的分布及组成；
The results showed that the distribution and composition characteristics can indicate oil fractionation effects.
结果表明，原油中含氮化合物的分布和组成特征较好地指示了该区的油气运移效应。
Others, like Bruce Draine of Princeton University, will study the size distribution and composition of the grains themselves.
另外一些天文学家，比如普林斯顿大学的布鲁斯·德雷恩，他将会研究颗粒本身的大小分布及组成。
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