然后，服务器的磁盘头随机移动到磁盘的各个区域查找更改或更新过数据的磁道或扇区。

Then, the server's disk head had to move randomly over all areas of the disk to get to the proper track and sector for the data that was changed or updated.

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每个基站典型地服务于包括多个扇区的小区。

Each base station typically serves a cell that includes a plurality of sectors.

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