Environment factor and technology factor bring indirect influence to interaction efficiency by restricting or supporting human factor and information system factor.
而环境因素、技术因素通过制约或支撑人的因素、信息系统因素对交互效率产生间接影响。
Web based Learning Supporting System is the basic environment of implementing the Web Cooperative Learning.
网络学习支持系统是实施网上协同学习的基础环境。
Displacement and deformation of deep pit supporting system concern not only security of the pit, but also the safety of the surrounding environment.
深基坑支护系统的位移与变形不仅关系到基坑本身的安全问题，也影响到周边环境的安全。
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