为了压缩数据，LZ 77算法使用对匹配数据的引用来取代数据部分。匹配数据已经通过编码器和解码器传递。

To compress data, the LZ77 algorithm replaces portions of the data with references to matching data that has already passed through both the encoder and the decoder.

youdao

现今大部分云计算基础设施都能提供可靠的服务，这些服务通过由基于计算和存储虚拟化技术的下一代数据中心交付。

The majority of cloud computing infrastructure currently consists of reliable services delivered through next-generation data centers that are built on compute and storage virtualization technologies.

youdao

这部分归功于许多替代数据；比如说，里昂证券编制自己的采购经理指数（见注一）。

This is partly because there are alternative numbers to go on; CLSA, for example, produces its own purchasing-managers’ index.

youdao

I mean, you may not understand it with algebra before but some of these sorts of pictures have you seen before?

我是说可能代数部分你没看懂,但你们以前见过类似的图像吧

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