Tracking the origin of different sources of information would be difficult, if it wasn't for a built-in mode provided by Perl called taint mode.

如果Perl没有提供称为污染模式的内置模式，那么追踪不同信息的来源就会变得很困难。

youdao

This one USES natural language processing algorithms instead of tracking links between sources, though, and the summaries from multiple sources are enjoyable to read.

但是Dygest.net使用了自然语言处理算法，而非追踪不同信息源之间的链接。由多个来源整理出来的摘要让人读起来很舒服。

youdao

In my environment, this XML file is one of several critical data sources for tracking information related to products.

在我的环境中，这个XML文件是用来跟踪有关产品的信息的重要数据源之一。

youdao

But the hard part is tracking online sources back to a real company, not to mention determining whether the drugs are counterfeit.

FORBES: Brandjacking Big Pharma

Many people use Twitter as a kind of new-age radio, getting the latest information about everything from transportation delays and retailing promotions to news about various industries by tracking the Twitter accounts of trusted sources, including news agencies, analysts and companies or their executives.

WSJ: Saudi Prince Buys $300 Million Stake in Twitter

We are not going to start, with a calculator and an adding machine, tracking down what people received from other sources, other funds, other help from relatives, savings.

NPR: Managing The $30 Million 'One Fund' To Aid Boston Victims