FRESH COUNTRY AIR乡村新鲜空气
Fresh-air inlet吸气口;新鲜空气入口;新鲜空气进口
fresh-air raise入风天井
Fresh mountain air山上有清新的空气
fresh-air educate露天学府
fresh-air sports户外运动
fresh-air mask新鲜空气呼吸面具;送新鲜空气面罩
fresh h air新鲜空气
fresh-air outlet能风孔
The fresh air in the room is a complicated problem, which is a lot of uncertain conditions. So this paper try to study fresh air and indoor air quality problem with uncertain method.
不确定性方法是用来解决信息不完全、不确定的问题的方法， 室内新风量是一个复杂的问题，存在很多不确定性的条件，因此本文尝试用不确定性方法来研究室内新风量与室内空气品质。
参考来源 - 新风量对室内空气品质影响的不确定性方法分析研究N-UNCOUNT（不可数名词） You can describe the air outside as fresh air, especially when you mean that it is good for you because it does not contain dirt or dangerous substances. 新鲜空气 [also 'the' N]
"Let's take the baby outside," I suggested. "We all need some fresh air."
“我们把宝宝带出去吧，”我建议道。“我们都需要一些新鲜空气。”