The level of pollution in the river was falling.
该河流受污染的程度其时正在降低。
These cores show that the level of pollution, especially soot, in Himalayan glaciers correlates with emissions in Europe and South Asia.
这些冰心不仅表明了此地的污染程度，更重要的是说明了喜马拉雅山冰川上的烟灰与欧洲和南亚的排放相关。
Another difficult question involves what level of pollution is safe.
另一个难题是什么样的污染水平是安全的？
Air quality is declining steadily, and the air in many cities has reached a serious level of pollution.
空气的质量在不断下降，部分城市的空气已达到严重污染的程度。
It is of great significance for some of the mines using model LK-1 LHDs in our country to reduce their level of pollution.
改造LK——1型铲运机，以降低其污染水平，对我国某些使用这种设备的矿山具有重要的意义。
Data from three of the pigeons, called Coco, Julius and Norbert, will then be used to instantly reply, telling them about the level of pollution in their area.
名为可可、朱利叶斯和诺伯特的三只鸽子收集的数据被用来即时回复市民消息，告知市民所在地的污染水平。
Prices and quantities also determine the amount of environmental resources used and the level of pollution generated as the entities in the market carry out their activities.
价格和数量也决定了市场中各实体在进行经济活动时使用的环境资源的数量和所造成的污染程度。
Prices and quantities also determine the amount of environmental resources used and the level of pollution generated as the entities in the market carry out their activities.
价格和数量也决定了市场中各实体在进行经济活动时使用的环境资源的数量和所造成的污染程度。
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