说明：  以VRTX为对象详细介绍了嵌入式实时操作系统的原理和应用，特别是第一部分关于嵌入式实时系统基础 的介绍非常适合初学者全面地了解嵌入式实时操作。
(to VRTX detailed targets for the embedded real-time operating system and application principles, especially the first part of the embedded real-time systems based on very suitable for beginners to understand fully embedded real-time operation.)