Even if everything seems to work fine, I'm not sure I didn't break something else in the system that won't show up until later.
即使一切似乎都工作良好，但我不能确保过去在系统中没有出现的问题在以后还不会出现。
2
The trick is to understand that if you cannot define a signature for the whole system, you need to break it up into smaller subsystems and define a pointcut for each one.
当不能为整个系统定义一个签名时，要知道将它分解成小的子系统，并为 每个子系统定义切入点。
3
After all, it's much easier to start with a modular system and build your way up than to take a monolithic system apart and break it into modules.