Because of these disturbances, the receiving speech signal is not clean and original but the polluted one.

所有这些因素会造成接收到的语音信号并非纯净的原始语音信号，而是受噪声污染的带噪语音信号。

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One of the concrete ways people have been doing this is by cleaning up polluted habitat areas and then replanting native flowers that humming birds feed on.

人们一直以来采取的保护蜂鸟栖息地的具体措施之一是清理受到污染的栖息地，然后重栽蜂鸟赖以生存的花草。

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Environmental activists say that this is just one example of how the U.S. military has polluted their land.

但环保人士说，这只是美军污染他们土地的例子之一。

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The partly enclosed Baltic Sea is known as one of the most polluted seas in the world.

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The fact that Romania has an average January temperature in the mid-20s, the lowest per capita income in the European Union and is the home to both Dracula and Copsa Mica, one of the most polluted cities in the world, never entered into my thinking.

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The most far-reaching: revitalization of the area around the hopelessly polluted Inner Harbor, a one-mile-long channel that runs from Onondaga Lake to within a few blocks of downtown.

FORBES: Magazine Article