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。
F1 chief executive Ecclestone was unrepentant for championing the twilight concept. "I only regret the rain," he said of Sunday's race.
的F1大奖赛是执迷不悟倡导的黄昏概念。“我只是感到遗憾的是雨，他说：”周日的比赛。
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。
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