随着应用的不断扩展，也对标图软件的可移植性和可扩展性提出了要求。
With the expansion of applications, portability and scalability of plotting software is put forward.
在这个系统中，对软件的可移植性及Z - 80开发环境的改善作了一些有益的探讨。
In this system, the useful work about software portability and improvement of Z-80 development environment is achieved.
在软件方面，采用分层、模块化的实现方式，提高了软件的可移植性和软件管理的方便性。
For software design, layered and module method is used, that makes the software easier to migrate and manage.
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