Moreover, the PRI has always retained the majority of state governorships.
此外，PRI一直占有多数的州长职位。
During commissioning stage, the company has always retained some personnel tracking services to help customers to solve the problems which may arise at any time.
在调试阶段，公司始终保留一些人员进行跟踪服务，以帮助客户随时解决可能出现的问题。
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