Placide's disk

例句：

1. 1. The computer has a Placide's disk that stores all the programs.
   这台电脑有一个普拉西德的磁盘，用来存储所有的程序。
2. 2.The disk drive is a crucial component of the computer system.
   磁盘驱动器是计算机系统的关键部件。
3. 3.The disk was scratched by the sharp edge of the knife.
   磁盘被刀尖划伤了。