指在一个社会单元中，人们对占据特定位置的个体所期望的一套行为模式。
A set of behavior patterns expected of someone occupying a given position in a social unit.
角色；指在一个社会单元中，人们对占据特定位置的个体所期望的一套行为模式。
Role: a set of behavior patterns expected of someone occupying a given position in a social unit.
物流系统是一个由众多物流单元组成的大系统，它的可靠性程度对企业和社会的平稳运行有着重大的影响。
The reliability of logistics system has a great influence on the society and the enterprises. A logistics system is a huge system contained many logistics units.
从社会再生产过程看，物流是再生产过程中一个重要的基本环节，在国民经济诸单元中起着桥梁和纽带作用。
From the social reproduction process, the logistics is an important process of reproduction of the basic link in the national economy in the various modules and linking role to play bridge.
从社会再生产过程看，物流是再生产过程中一个重要的基本环节，在国民经济诸单元中起着桥梁和纽带作用。
From the social reproduction process, the logistics is an important process of reproduction of the basic link in the national economy in the various modules and linking role to play bridge.
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