In operating systems, a system call, also known as a system service request, is the mechanism an application USES to request service from the operating system's kernel.
在操作系统中，系统调用，也称为系统服务请求，是应用程序用来向操作系统内核请求服务的一种机制。
In operating systems, a system call, also known as a system service request, is the mechanism an application USES to request service from the operating system's kernel.
在操作系统中，系统调用，也称为系统服务请求，是应用程序用来向操作系统内核请求服务的一种机制。
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