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 ## C++ Design Patterns
 
 Software design patterns are general reusable solutions to problems which occur
-over and over again in object-oriented design enviroment. It is not a finished 
+over and over again in object-oriented design environment. It is not a finished 
 design that can be transformed into source code directly, but it is template how
 to solve the problem. We can classify them by purpose into creational (abstract 
 the instantiation process), structure (how classes and objects are composed to form