当他有空的时候，他喜欢在公园里跑步锻炼身体。
He enjoyed running for exercise around the park when he was free.
当她说“我知道你没办法闲得住”，她说的是事实。我很少有空下来的时候。
I rarely had free time. When she said, I know you can't keep still, she was telling the truth.
如何提高性能并充分利用空间呢？方法就是当8k的页被多个行塞满的时候，要确保几乎没有空间浪费。
The trick to good performance and good use of space is to make sure that when the 8k page is filled with rows, there is little wasted space.
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