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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键值列是 pi/po（换进/换出的页面），这表示了对多少页面进行了交换。

The key columns are the pi/po (page in/page out), which indicate how many pages have been exchanged.

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