When we are walking on the street, we can see the ads everywhere, they are spread by the newspaper, the radio and so on.

当我们在街上走的时候，可以看到广告无处不在，广告通过报纸，广播等等方式传播。

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21st century is an information era, people get to know the outside world through various ways, such as newspaper, magazine, newscast, TV, radio and so on.

21世纪是信息时代，人们通过各种途径，如：报纸、杂志、新闻广播、电视、无线电等等来了解信息，认识外界的事物。

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This article takes the spectrum allocation algorithm as the object of study. Firstly, introduce the background, present situation and applications of cognitive radio and so on.

本课题以频谱分配算法为研究对象，首先对认知无线电的研究背景、现状以及应用等知识做了简要介绍。

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Whether this means an increase in other channels such as email, mobile, radio, and so on, is obviously not known, yet.

FORBES: How The USPS Decision To Stop Saturday Mail Delivery Will Affect Marketers

He intends to calculate how much parties are actually spending by carefully adding up the estimated costs of all television and radio spots, campaign rallies and so on.

ECONOMIST: Mexico

He could not reach them on the radio and so he walked up to tell them and was never seen again.

BBC: 9/11 defined the past decade for the US and Europe