"NOP"是一条真正的指令，它不执行任何实际的动作，是一条"空操作"（No Operation）指令。这就让人有些犯迷糊了，源程序中并没有这个指令，为什么编译后却多了这样一个东西？
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NOP no operation 无操作指令 ; 无操作 ; 无操纵指令 ; 空操作
no-operation 无操作指令 ; 空操作指令 ; [计] 空操作
no-operation instruction 无操作指令 ; [计] 空操作指令 ; 无作业指令 ; 不操作指令
NOP-No operation 空操作
no-operation bit [计] 空操作位
correct no-operation 正不动作
no-operation room unit 不运行居室机
conditional no-operation instruction [计] 条件空操作指令
不需要手术、什么都不需要。
A composite state can also have a default transition with no operation.
组合状态还可以具有不带操作的缺省转换。
You can have more than one transition from a state associated with the same operation (or with no operation); however, in this case, each transition must have a guard.
您还可以具有多个来自一个与同一操作关联（或不与任何操作关联）的状态的转换；但在此情况下，每个转换必须具有一个监护。
(NO TRANSCRIPTS) In a military operation, strategy decisions are important.
VOA: special.2009.11.01
"If Madoff acted alone, it would all end right now. There is no way this kind of operation could have taken place all by himself."
VOA: standard.2009.03.12
The commando operation Monday appears to have been executed smoothly and with no civilian casualties.
VOA: standard.2009.09.15
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