It covers the basics of Portable operating system Interface (POSIX), real-time operating systems, and Pointers for real-time analysis.

它涵盖了可移植操作系统接口(POSIX)、实时操作系统的基础知识，以及一些实时分析技巧。

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The Korn shell conforms to the Portable Operating System Interface for Computer Environments (POSIX), which is an international standard for operating systems.

Korn shell 符合计算机环境的可移植操作系统接口标准 (POSIX)，这是操作系统的国际标准。

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Portable B-mode ultrasonic diagnostic apparatus system is made up of the human computer interface by the ARM side and FPGA-side imaging systems and display system.

便携式B型超声诊断仪由ARM端人机交互系统、FPGA端成像系统以及显示系统构成。

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