This paper Introduced USB device sort and its logic structure level relation in summary.

扼要介绍了USB设备的分类及其逻辑结构层次关系。

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In makes an applied multi-level relation model to be basement of security database for following the BLP model.

为了适应BLP 模型，采用一种实用的多级 关系 模型作为安全数据库的基础，这是原有 关系 模型的扩展。

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This mechanism is called correspondence and allows MTF to traverse a whole model by applying all the correspondences reachable (directly or transitively) from the top-level relation.

这种机制称为通讯，它允许MTF通过把从顶级关联开始的所有通讯变为可到达的（直接或间接）横跨一个完整模型。

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However, the Bank has somewhat reduced its medium-term forecast for consumer spending growth and says that it could turn out to be even lower because household debt has reached a record level in relation to income.

ECONOMIST: The economy

The bottom line: PE should be seen in relation to the level and the direction of interest rates rather than in relation to its historical level.

FORBES: Is a Low PE a False Buying Signal for US Stocks?

But given the level marketing acitivity in relation marketing opportunity, one stereotype will surely not be dispelled: British understatement.

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