优秀设计的关键因素之一就是注意保持系统的可维护性。
One of the keys to good design is keeping an eye on maintainability.
软件设计采用自顶向下的方法，缩短了开发周期，提高了系统的可维护性。
The top-down method was adopted to design the software, which shorted the developing period and enhanced the system's maintainability.
此外，根据抽象性和不稳定性来测量系统平衡将使您不断的了解系统的可维护性。
In addition, measuring your system's balance in terms of abstractness and instability gives you an overview of its maintainability over time.
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