The system is available for earth-rock allocation problems in road projects, airport projects and other large-scale civil engineering.
同时，本系统对道路工程、机场及其他大型土建工程中的土石方调配问题同样适用。
Digital railway is the subset of Digital earth. It is also a epitome of Digital earth that is huge system engineering.
“数字铁路”是“数字地球”概念的一个子集，也是“数字地球”这一庞大系统工程的一个缩影。
The scientific system of the "digital earth" consists of three parts: basic research, technical support and scientific engineering.
“数字地球”的科学体系由基础研究、技术支撑和科学工程三部分组成。
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