RAM is also known as volatile memory because the information within the computer chips is lost when power to the computer is turned off. 随机访问存储器也称作易失性存储器，因为当计算机的电源关闭时，计算机芯片中的信息随着丢失。
We can understand the addressing mode better and call it correctly by analyzing the storing position of memory's data operation. 从分析存储器操作数的存放地址入手，可以更好地理解寻址方式，准确访问存储器操作数。
