At the city's night schools, thousands of workers end their days with classes on every subject from car maintenance to law.

在这座城市的夜校里，数以千计的人们在结束了白天的工作之后，去夜校学习从汽车维护到法律的各种科目。

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When I modify code in these classes, I can implement certain refactorings such as Move Method along with certain design patterns to improve the ease of maintenance incrementally.

当修改这些类中的代码时，就能够实现特定的重构(比如Move Method)和特定的设计模式，以逐步改进可维护性。

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The creation of such classes is laborious, and maintenance can be a burden.

这样的类创建起来比较麻烦，而且不易维护。

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