求翻译：在水利水电、土地整理和道路选线工程应用领域，土方工程是重要组成部分，也是影响项目成本的重要因素，在城市设计中涉及到丘陵地形时，土方量也往往是投资估算的重要项目。是什么意思？

In the field of water conservancy and hydropower, land preparation and road engineering applications of the line selection, the earthworks are an important part of, is also an important factor affecting the cost of the project involved in urban design to the hilly terrain, earthwork is often importa

In hydro-power, land management and road options online engineering application areas, earthworks, and is also an important part of the impact the cost of the project, and important factors involved in urban design in the hilly terrain, it is also estimated investment is often an important project.

In the water conservation water and electricity, the land arrangements and the path route selection project application domain, the earthwork is the important constituent, also is affects the item cost the important attribute, involves when the city layout to the rolling topography, the earth volume

In water conservancy and hydropower engineering applications, land consolidation and road line selection, earthworks are important components of, are also important factors that affect project costs, in the city's hilly terrain is involved in the design, earthwork is often estimated investment is an

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