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外部存储器External Memory(中英双解)

  External memory, also known as secondary storage, is extension of the internal memory. Its major function is to permanently store the system files, application programs, user programs, documents, data and so on, all of which are needed by computer during processing.
  When CPU needs to execute some programs and data, they are moved from the external memory to the internal memory in order to provide CPU for access. Therefore, the function of the external memory is to expand the capacity of the storage system.
  外部存储器,也称辅存,是内存的延伸。其主要作用是长期存放计算机处理所需要的系统文件、应用程序、用户程序、文档和数据等。
  当CPU需要执行某部分程序和数据时,就由外存调入内存供CPU访问。因而,外存的作用是扩大存储系统的容量。

 

U-diskU-disk


  U-disk: U-disk is a kind of new style mobile product used to store any data file and can exchange conveniently files in the computer. U-disk supporting USB interface can be inserted into USB interface of computer directly and linked with computer through one USB switching cable. By read-write speed, U-disk carrying out USB interface criterion enjoys popularity, speed of which is much higher than floppy disk.
  U 盘是一种新型的移动存储产品,可用来存储任何数据文件和在电脑间方便的交换文件。U盘支持USB接口,可以直接插入电脑的USB接口,通过USB转接电缆与电脑相连。从读写速度来说,U盘采用USB接口标准广受欢迎,读写速度比软盘快的多。

 

Hard diskHard disk

 

Hard disk: Hard disk, which is the most familiar one of the external memory, is just as the external repository of data. The hard disk, also known as fixed disk, is composed if disk sheets of magnetic substance coated with mental material and read-write devices of the disk sheets. These disk sheets and the read-write devices are enclosed together.
硬盘是一种最为常见的外部存储器,它好比是数据的外部仓库一样。硬盘又叫固定盘有金属材料涂上磁性物质的盘片与盘片读写装置组成。这些盘片与读写装置是密封在一起的。


Key words & Expressions:
External memory: n.外部存储器
Criterion: n.标准
Repository: n.仓库
Disk sheet: n.盘片
Magnetic: adj.有磁性的

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