它旨在作为一个基本的框架，工具开发人员可以通过插件来扩展它。
It's designed as a basic framework that tool developers can extend through plug-ins.
早期的广告显示的价格为基本车床作为39.75美元，与四十一点五○美元正价格为车床与一个驱动器狗，工具位和测试棒。
An early advertisement shows the price for the basic lathe as $39.75, with $41.50 being the price for a lathe with a drive dog , tool bit and test rod.
本文的结果证实，SAPNC系统是一个具备各种基本功能的电路符号仿真程序，经进一步的完善后，可望作为一种教学、科研的辅助工具；
The Results confirm that, SAPNC is a circuits' symbolic simulator with kinds of basic functions, and with further improvement it could be a useful tool for both teaching and research;
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