The traditional teaching mode is monotonous, abstract and obscure, and has a negative effect on the teaching quality.
传统教学模式单调、抽象、难懂，影响教学质量。
The engineering mathematics teaching same as mathematics teaching is almost a combination of the abstract theory and the obscure concept.
工程数学课程教学与数学一样，几乎是抽象理论与晦涩概念的结合体。
GIS may turn the obscure and abstract data forms into distinct and concise colorful maps. It helps specialists make strategic decisions.
GIS可以将晦涩抽象的数据表格变为清晰简明的彩色地图，帮助专业人员进行决策；
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