求翻译：在分销渠道方面，由于各国营销环境的差异，造成了不同的分销系统与分销渠道，各国的分销机构的形式、规模不同，从而增加了管理的难度。是什么意思？

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Due to differences in the distribution channel marketing environment, the differences between the different systems of distribution and distribution channels, states in the form of distribution agency, different in scale, thus increasing the difficulty of management.

In the retailing channel aspect, as a result of the various countries' marketing environment difference, has created the different retailing system and the retailing channel, the various countries' retailing organization form, the scale is different, thus increased the management difficulty.

In terms of distribution channel, because of differences in national marketing environment, resulting in a different distribution systems and distribution channels, forms of national distribution organization, size, thus increasing the difficulty of management.

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