This concept is particularly relevant today because sulfur dioxide, a contributor to acid rain, is subject to environmental regulations.
在今天，这个概念是有十分重大的意义的，因为二氧化硫，酸雨的成因，对环境的管理是有害的。
The paper summarizes the shortcomings of present highways, and expounds the concept and the significance of rain and snow prevention expressway of new type.
总结现有公路的不足之处，提出新型防雨雪高速公路概念，并对防雨雪高速公路的意义及必要性进行阐述。
Years of wind and rain created a new business concept.
多年的风雨铸就崭新的企业经营理念。
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