一种流行的方式是向开源的核心程序出售专利的扩展功能。
A popular approach is to sell proprietary extensions to an open-source core.
微软没办法使用全新的、基于矢量、分辨率无关和硬件加速的WPF来构建任何操作系统核心程序。
Microsoft couldn't use the clean, vector-based, resolution-independent, hardware-accelerated, WPF library to build any of the core operating system applications.
Linus Torvalds发布了Linux核心程序版本1.2.0(即linux 95)。
Linus Torvalds released version 1.2.0 of the Linux kernel (A.K.A. Linux 95).
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