通常，所有这些代码都与应用程序逻辑交织在一起，从而使得应用程序维护有些困难。
Usually, all this code is intertwined with application logic, making it cumbersome for application maintenance.
通常，所有这些代码都与应用程序逻辑交织在一起，从而使得应用程序维护有些困难。
Usually, all this code is intertwined with application logic, making it cumbersome for application maintenance.
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