英语翻译
Memory
The primary memory is the most important resource a computer has.Since CPUs are only made with instructions for reading and writing to memory,no programs would be able to run without it.There are two types of memory:RAM - random access memory,or read/write memory,which loses its contents when the machine is switched off,and ROM - read only memory,which never loses its contents unless destroyed.ROM is normally used for storing those most fundamental parts.