The heterogeneity of the permeability distribute of rock directly influences the distribution, migration and production of hydrocarbons.

储层岩石的渗透率分布的不均匀性直接影响油气分布、运移以及开采。

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The purpose of researches on urban dust is focused on the source of dust material, composition of dust, distribution, migration and evolution, pollution effects and prevention and cure.

研究城市灰尘的目的是研究其物质来源、物质成分、分布规律、迁移演化、污染效应、防治治理等。

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HomePlug AV has been the powerline technology of choice, and AV2 provides an aggressive migration path to support greater network capacity and distribution of ultra-high quality content throughout the home.

ENGADGET: HomePlug Powerline Alliance reveals features of new HomePlug AV2 spec

If we are interested in distribution from the point of view of issues such as migration, the marginalisation of developing countries and capacity to repay foreign debts, we should compare incomes with market exchange rates.

ECONOMIST: Letters