Cars, being the greatest source of air pollution, can be left at home this weekend.
2
中央空调通风系统送风中的污染物是室内空气的主要污染源之一，主要的污染物是可吸入颗粒物和微生物。
The contamination in the central air conditioning duct system is the one of the principal contamination of the indoor air, it include inhalable particle and microorganism.
3
虽然这个研究站远离人类主要的污染源，但是大气环流会把欧洲和北美的空气带到北极地区。
Although the research station is far from major sources of human pollution, atmospheric circulation brings air from Europe and North America into the Arctic region.
点击反馈