Description system的用法和样例：
例句
- Each hierarchy level of the functional location number represents a given level of detail in the description of the system.
每一层功能位置编号都可以描述系统中一给定级别的细节。 - The goal of a differentiating factor is to prevent multiple scenarios from being created that describe the same flow through the system.
区别性因素的目的是防止创建描述系统中同一流程的多个方案。
