When calculating the amount of fresh air required to dilute smog, mass or volume concentration is introduced into the formula to replace the old smog concentration;
依据稀释烟雾计算隧道需风量时，在公式中应引入烟雾的质量浓度或烟雾的体积浓度，并用其替代公式中的一般烟雾浓度；
When determining air demand for tunnel ventilation, the air demand is taken from the bigger one between calculation of CO concentration index and smog concentration index.
隧道通风需风量的确定是取CO浓度指标和烟雾指标计算出来的较大者作为需风量。
The smog that has engulfed Moscow for a week eased a bit Tuesday, but the concentration of pollutants remained high.
周二，盘踞莫斯科达一周之久的烟雾稍有消散，但空气污染物浓度依然很高。
应用推荐