You basically have three sources of input and output.

一般说来，主要存在三个输入和输出源。

youdao

For example, consider a federated union query across three sources.

例如，考虑一个跨三个数据源的联邦联合查询。

youdao

There are three sources from which it usually breeds: 1) your relationships, 2) yourself, and 3) your environment.

消极通常有三大来源：你的社会关系、你自己和你所处的环境；

youdao

The press and other sources,he notes, speculated that the sentence could have been seven years or more, so three years is not all that bad.

VOA: standard.2009.03.12

The two are opposites. They are opposed and antagonistic towards one another. So Klawans points out, as you know, that there are three main sources of impurity in P.

它们是对立的，对立且相敌对,因此正如克洛文所指出的，在P中，有3个主要的不洁来源。

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Money can only come from three sources in this business: the government, subscribers or advertisers.

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For there are three sources of revenue for a newspaper: classifieds, subscription revenues and display advertising.

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Back in the day, only two decades ago in fact, US newspapers had three sources of revenue.

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