让血液流动起来，让二氧化碳呼出去，换进新鲜健康的氧气。

Get the blood flowing and the carbon dioxide out and bring in healthy new oxygen.

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内核中称为调度程序的部分将工作换进换出，从而让所有工作都获得一轮执行。

The part of the kernel called the scheduler swaps jobs in and out so that they all get a turn.

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vmstat 工具输出线程/进程信息、内存/交换区使用率、换进/换出页面、磁盘 I/O、页面错误和 CPU 统计信息。

The vmstat tool outputs thread/process information, memory/swap usage, page ins/outs, disk I/O, page faults, and CPU statistics.

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