另外，在这种结构下，要换后台程序，同时想保持网址不变，是很困难的。
Additionally, this structure makes it difficult to switch to different software while continuing to use the same URLs.
另外，在这种结构下，要换后台程序，同时想保持网址不变，是很困难的。
Additionally, this structure makes it difficult to switch to different software while continuing to use the same URLs.
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