在给定信号强度和噪声水平的情况下，以比特每秒为单位给出的最终限制是无差错通信的最大绝对速率。
The resulting limit, given in units of bits per second, is the absolute maximum rate of error-free communication given signal strength and noise level.
该命令的关键部分是能够识别正在运行的进程，提取与给定字符串匹配的进程，并使用 kill 命令将 KILL 信号发送到每个匹配进程。
The key component to the command is the ability to identify running processes, extract the ones matching a given string, and use the kill command to send the KILL signal to each matching process.
配套的实用程序pkill接受pgrep的所有选项和一个信号，它把这个信号发送给与给定的条件匹配的所有进程。
A companion utility, pkill, takes all the options of pgrep and accepts a signal to send to all processes that match the given criteria.
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