defrag

n.[计] 整理磁盘文件碎片的工具

对计算机硬盘进行碎片整理；

动词；

1、It's important to defrag your computer regularly to optimize its performance.
定期对计算机进行碎片整理可以优化其性能。
2、After defragging the hard drive, the computer runs much faster.
碎片整理硬盘后，计算机运行速度明显加快。