论文还讨论影响沉积物分布的主要因素和按区域划分(北部、中部、南部)的污染特点。

We have also discussed the main factors influencing the distribution of sediments and the pollution characteristics and effects on regions (the north, the middle and the south of coast).

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然而，阿德霍尔德的信并没有给家人带来团聚，而是揭示了该地区存在的一种分歧。该地区有9700名学生，而且基本上是按种族界限划分的这个区域。

But instead of bringing families together, Aderhold's letter revealed a divide in the district, which has 9,700 students, and one that broke down roughly along racial lines.

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例如，一家大型银行可能按区域、部门和帐户来划分单元。

For example, a large bank may divide its units by regions, branches, and accounts.

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