The biggest stumbling block for migrating an existing system to OSGi today is often the modularization of a system that wasn't created in a modular way in the first place.
现在要想把已有系统往OSGi上迁移，最大的障碍往往是系统的模块化，因为系统最初就不是以模块的方式构建的。
The method of modularization is used to design the system. It shortens the period and reduces the difficulty of development.
本文采用模块化的设计方法对系统进行设计，缩短了开发周期，减小了开发难度。
In the aspects of software modularization, emphasize to analyze USB device firmware, driver program of computer operating system and interface program-three parts of programming method.
在针对软件的模块化方面，着重分析了USB外设端的固件、主机操作系统上的客户驱动程序以及操作界面程序三个部分程序编写方法。
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