在方法上首先完善扩充原有系统，其次探索采用新技术逐步升级整个系统；

The means is extension to old system and then upgrading whole system with new technology.

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该系统具有便于后期的维护、扩充和升级的特点。

The system is easy to maintain, expand and update.

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该系统具有便于后期的维护、扩充和升级的特点。

The system is easy to maintain, expand and update.

youdao