The key buffer stores index blocks for MyISAM tables.
关键字缓冲区保存了myisam表的索引块。
The average value for each key dwell time for the entire buffer is computed and returned.
将计算并返回整个缓冲中的每个按键停顿时间的平均值。
Because the search is incremental, Emacs begins highlighting matches as you type a single character-in this case, when you press the t key, all the t characters in the buffer are highlighted.
由于搜索是增量式的，因此Emacs会在键入一个字符的时候就开始突出显示匹配项——在本例中，当您按下t键时，会突出显示缓冲区中的所有t字符。
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