Using finite element numerical simulation method,3 dimension indeterminate constant eqution of the fully mechanized caving coal face goaf airflow rule motion is solved.
采用有限元数值模拟方法求解了综采放顶煤工作面采空区风流运动规律的三维非定常气体渗流方程， 用该数值计算模型（ 软件程序） 能够较为有效地反映出采空区内的风流压力和速度分布情况， 结合实例， 给出了采空区内自然发火影响带与漏风风量的关系。
City dwellers inhale foul air
城市居民吸进污浊的空气。
It replaces the polluted air by successively displacing it by fresh air.
它用新风成功有效地替换了污浊的空气。
Seeping through the squalid air of the police station, the sour smell of dirt and disinfectant.
渗透警察所污浊的空气，就是那种污垢和消毒水剂混合的酸味。
a device that introduces fresh air or expels foul air.
导入新鲜空气排出污浊空气的装置。
the vitiated atmosphere of our polluted inner cities
我们市中心区受到污染的恶浊的空气
The air of a big city is often impure.
大城市的空气往往是污浊的。
The air is chill and stagnant, the language apocalyptic.
空气寒冷而污浊，语言则是《启示录》式的。
A device that circulates fresh air and expels stale or foul air.
通风设备流通新鲜空气并排放污浊有害空气的设备
The air was bad and readers got terrible headaches
空气污浊，使读者头痛难忍。
The air in the room was heavy.
屋子里的空气是沉浊的。
even as in one who at last draws free air, after a long stifling with his own polluted breath.
就像是被自己污浊的呼吸长时间窒息之后，终于吸进了自由的空气。
It gets the stuffy CO2 out and makes inhaling much easier.
这样能把污浊的二氧化碳送出去，而且更容易把空气吸进来。
The sky was a tumult of discoloured clouds.
天空中乱纷纷地浮动着污浊的云。
The place smelled of the oil of the machines and the new leather-- a combination which, added to the stale odours of the building, was not pleasant even in cold weather.
这地方弥漫着机油和新皮革的混合气味，再加上楼里污浊陈腐的气味，即使在冷天空气也很难闻。
They live amid reek and squalor.
他们生活在臭气熏天的污浊环境中。
The Indian government's environment watchdog has expressed concern about increasing air pollution around the world-famous marble monument to love, the Taj Mahal.
印度环境监察部门近日表示，污浊空气正在将世界闻名的爱情的丰碑——泰姬陵重重包围。
The stale air made us suffocate.
浑浊的空气使我们感到窒息。
The atmosphere is strained and quiet, the air stale.
气氛紧张宁静，空气混浊。