According to its source, it can be divided into three categories: policy information noise, basic information noise and the second hand information noise.

根据其来源不同可分为政策信息噪声、基础信息噪声和二手信息噪声三大类。

youdao

The magazine said it had bought eight second-hand drives from Internet auction site eBay and recovered 22,000 "deleted" files, including some information that could be confidential.

该杂志称，他们从eBay购物网上买了八个二手驱动，恢复了22000个被“删除”文件，其中还包括一些机密信息。

youdao

The magazine said it had bought eight second-hand drives from Internet auction site eBay and recovered 22, 000 "deleted" files, including some information that could be confidential.

该杂志称，他们从eBay购物网上买了八个二手驱动，恢复了22000个被“删除”文件，其中还包括一些机密信息。

youdao

This happens mainly for accounting reasons: if the first call centre were to hand over all the information to the second one, it would bear the main cost of the call and make the second look more efficient.

ECONOMIST: Timely technology | The