volatile-dynamic storage

Unlike storage, most RAM is volatile, which means that it requires electrical power to hold data.

与硬盘不同, 大部分的内存是不稳定的, 也就是说它需要电能来容纳数据.

Since main memory ( primary storage) is volatile and too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory.

由于主存（基本存储器）是易失性的，而且太小不足以永久保存所有的数据和程序，计算机系统必须提供二级存储器备份主存。

You can only create a toolbar for folders located on non-removable and non-volatile storage media.

您只能为位于非可移性和非挥发性存储媒介上的文件夹创建工具栏.

ROM is usually for the permanent, non-volatile storage of an applications program.

ROM通常是用于永久的 、 非易失的应用程序存储.

Random access memory : Volatile storage that holds the program and data the CPU is presently processing.

随机存取内存: 支撑处理器目前正在处理的程序和数据的掉电后不能存储的存储器.