source and special material

基本解释

The special topography, climate conditions and the underlying surface with the source of the abundant sand were the material base of forming sand and dust storm.
特殊地形、气候条件和富含沙尘源的下垫面是形成沙尘暴的物质基础；
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We have good connection with material and equipment suppliers and have a special department and IT network to source materials that are most suited for the particular project.
我们与材料和设备供应商有良好的关系，为符合特殊项目的要求我们还设置了专门的部门和IT网络系统以获取最合适的材料。
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