However, they do not contain some information, such as joins, which are needed to generate SQL queries.

但是，它们不包含生成s QL查询所需的某些信息，比如联结。

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However, for other Web servers which do not implement HTTP compression, a commercial product might be needed.

不过，对于其他未能实现HTTP压缩的Web服务器，可能需要商业产品。

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Though not the first to do so, Mr Rifkin argued prophetically that society was entering a new phase—one in which fewer and fewer workers would be needed to produce all the goods and services consumed.

虽然之前也有类似书籍出版，但Rifkin预言了社会正步入新的阶段--届时参与生产商品或提供服务的劳动者需求量将日益减少。

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