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				           		当处理器执行一段程序时,它先从内存中读出一条指令并对它进行解码。
						        					            	 As the processor executes a program it reads an instruction from memory and decodes it.
								    										 
								    				            	 youdao 
- 
				           		当处理器执行一段程序时,它先从内存中读出一条指令并对它进行解码。
						        					            	 As the processor executes a program it reads an instruction from memory and decodes it.
								    										 
								    				            	 youdao