Based on the shortcoming of the method of average pollution index assessment, this paper put forward the method of active pollution index to assess the environment of polluted river water.

针对水环境质量的均值污染指数评价方法的缺点，提出了利用活性污染指数法来评价微污染水体环境。

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The streamlined directory allows additional metadata without pollution of Active Record.

streamlined 目录支持额外的元数据，而不会污染活动记录。

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Active filters have been used to solve the problem of more and more serious reactive power and harmonic pollution to power systems.

有源滤波器在为解决日益严重的无功和谐波污染问题方面可发挥有效作用。

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The pollution began in 2003 with the introduction of ETFs that tracked highly-active stock picking strategies.

FORBES: Index Fund Pollution