The problem here is that you lose the ability to include only certain parts of the framework, and you also make maintenance more difficult.

这种方法的问题在于你失去了只加载部分框架内容的能力，并增加了维护的难度。

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They also must take into account that moving electrical lines underground makes routine maintenance of the system more difficult, and thus more expensive.

WSJ: Should Utilities Be Required to Bury Power Lines to Protect Them?

The electric third rail makes it more difficult to do maintenance safely. 1000V DC current will literally burn a person to a black crisp.

FORBES: Why Does BART Need To Do Nightly Maintenance?