求翻译：物理模型（Physical Data Model），是面向计算机物理表示的模型，描述了数据在储存介质上的组织结构，它不但与具体的DBMS有关，而且还与操作系统和硬件有关。每一种逻辑数据模型在实现时都有起对应的物理数据模型。DBMS为了保证其独立性与可移植性，大部分物理数据模型的实现工作由系统自动完成，而设计者只设计索引、聚集等特殊结构。是什么意思？

Physical model (Physical Data Model), is the physical representation of a computer model for describing the data structure on the storage media , it is not only with the specific DBMS , but also on the operating system and hardware.

Physical Models (Physical Data Model), is the computer's physical means that the model and describes the data on the storage media of the organizational structure, it will not only with a specific DBMS, but also with the operating system and hardware-related. Each of the logical data model in which

The physical model (Physical Data Model), is faces the computer physics expression the model, described the data on the storage medium organizational structure, not only it with concrete DBMS related, moreover also concerns with the operating system with the hardware.每一种逻辑数据模型在实现时都有起对应的物理数据模型。DBMS i

Physical modeling (Physical Data Model), is a physical representation of the computer-oriented model, described the organizational structure of the data on the storage media, it is not only relevant to a specific DBMS, but also associated with the operating system and hardware. Implementation in eac

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