These trace gases are not detectable by smell in any but the most heavily polluted atmosphere.
这些微量气体除了在污染最严重的大气外，是不能凭嗅觉察觉到的。
The atmosphere has been polluted. Oceans and rivers have been polluted.
大气、海洋和河流污染日趋严重。
The atmosphere of the city is very much polluted.
那个城市的空气受到严重污染。
Gases such as carbon monoxide, emitted by factories and automobiles, have seriously polluted the atmosphere.
工厂和汽车排出的一氧化碳一类气体严重污染了大气。
This paper presents that the sources of poisonous substance on textiles include atmosphere, water quality, the applied chemicals, the polluted soil, chemical processing and so on.
文中指出纺织品上有害物质的来源包括大气、水质、药剂的使用、土壤的污染和纺织品生产加工过程中的化学处理等。
The carbon monoxide from factories and cars seriously polluted the atmosphere.
工厂和汽车发出的一氧化碳一类气体严重污染了大气。
No one will be able to survive if the land, water and atmosphere are seriously polluted.
当土地、水和大气受到了严重污染，没有人能存活。
The atmosphere circumstance and small environment are badly polluted by the sewerage, exhaust gas and waste residue which are largely produced from industry production.
而工业生产中大量排放的污水、废气、废渣又对大气环境和小环境造成了很大的污染；
The earth's atmosphere is polluted naturally by sandstorms and the dust and gases from volcanoes. but the most serious kind of air pollution comes from people.
地球上的大气自然的受到沙尘暴和火山喷发的尘埃和气体的污染。但是最严重的空气污染确实人为的。
It's severely polluted, there is a great deal of smog in the atmosphere.
污染比较严重，空气中含有大量尘雾。
The atmosphere of the city is polluted.
那个城市的空气受到了污染。
The atmosphere, the soil and the water had been polluted because of using the agricultural chemicals, the chemical fertilizer and the agricultural membrane.
农业生产过程中，农药、化肥、农膜等的大量使用造成了严重的大气、土壤和水污染。
The atmosphere, the soil and the water had been polluted because of using the agricultural chemicals, the chemical fertilizer and the agricultural membrane.
农业生产过程中，农药、化肥、农膜等的大量使用造成了严重的大气、土壤和水污染。
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