Construction of system credit relies on that of both unofficial and official credit systems.
制度的信用建设既要依靠非正式信用制度的建设，更要依靠正式信用制度建构。
The larger cities have metro systems in operation, under construction, or in the planning stage.
较大的城市有地铁系统在运行，正在建设中，或在规划阶段。
There are many new power plants and geothermal heat pump systems under construction right now.
目前，很多新发电厂和地热泵系统正处在建设中，地热发电前景看好。
There are many new power plants and geothermal heat pump systems under construction right now.
目前，很多新发电厂和地热泵系统正处在建设中，地热发电前景看好。
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