求翻译：本文通过针对工程造价控制的重要性，对项目业主在建设工程的立项决策阶段，设计阶段、施工招标阶段和竣工结算阶段如何参与对工程造价的管理与控制，提出各阶段有效地管理与控制建设工程造价的方法与措施。是什么意思？

In this paper, the importance of project cost control, project owners in the project decision-making stage of construction projects, the design phase, construction tender stage and the completed stage how to participate in the management and control of the project cost, the construction of each stag