包含Security组件后，就会自动执行很多处理，即使还未使用该组件来保护操作。
By simply including the Security component, several things happen automatically, even if you don't use it to protect an action.
在多处理器计算机上，系统能以多线程同步执行，因为有多个处理器在机器上。
On a multiprocessor computer, the system can simultaneously execute as many threads as there are processors on the computer.
(多处理系统实时可执行体)一个自由的为嵌入式系统而设计的开源实时操作系统。
RTEMS (real-time Executive for Multiprocessor systems) is a free open source real-time operating system designed for embedded systems.
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