The complexity of complex equipment system itself causes to the complexity of its maintenance process.
由于复杂装备系统本身的复杂性导致了复杂装备系统维修过程的复杂性。
But with the banking service updating, software system become more complex, development and maintenance become much more difficult.
但是随着银行业务的增加和更新，系统日益复杂，系统开发和维护的难度越来越高。
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