在软件开发里，程序员编写前置和后置条件来确立特定软件组件的角色。
In software development, the programmer writes pre - and postconditions in order to establish the role of a particular software component.
代码编写会产生错误，这是因为和别人一样，程序员和软件工程师也会犯错误。
Programming errors occur because programmers and software engineers, like everyone else, can make mistakes.
代码编写会产生错误，这是因为和别人一样，程序员和软件工程师也会犯错误。
Programming errors occur because programmers and software engineers, like everyone else, can make mistakes.
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