r—The average number of runnable kernel threads over the timing interval you have specified.
r——在您指定的时间间隔内，可运行内核线程的平均数量。
B-the average number of kernel threads that are in the virtual memory waiting queue over your timing interval.
b——在您指定的时间间隔内，位于虚拟内存等待队列中的内核线程的平均数量。
Applying a negative-going trigger pulse simultaneously to RESET and TRIG during the timing interval discharges C and reinitiates the cycle, commencing on the positive edge of the reset pulse.
应用一个负的触发器脉冲在一个定时周期内来同时复位和触发，这样使电容器C放电并且重新初始化一个循环，从复位脉冲的正边开始启动。
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