Code has no effect 代码不可能执行到 ; 代码没有影响 ; 代码就不起作用 ; 代码不可述不可能执行到
Change to code "behind" the facade has no effect on code that USES it.
变到了代码的“后面”，facade不会影响到使用它的代码。
Code excluded during conditional compilation is completely omitted from the final executable file, so it has no effect on size or performance.
条件编译时被排除的代码在最终的可执行文件中被完全忽略，所以不会对大小或性能有任何影响。
Information in a program that is meant for other programmers (or anyone reading the source code) and has no effect on the execution of the program.
注释：程序中用来解释代码含义和运行效果的备注信息，通常给阅读代码的人准备的。
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