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- atmospheric ozone content 大气臭氧含量
- CFCs cause depletion of atmospheric ozone. 氟氯化碳会损耗大气臭氧。
- Catalyst addition not only reduces the residual ozone content by 60. 加入臭氧催化剂能使剩余臭氧含量降低60。
- Ozone sonde is widely used for in situ measurements of atmospheric ozone profiles from ground to 35 km. 臭氧探空仪是一种主要而又直接的探测大气臭氧垂直分布的技术手段。
- Overestimates the ozone contents. There must be other chemical reactions contributing to the reduction of the ozone content. 高估臭氧含量.;一定有其他化学反应也促使臭氧含量的下降
- For high ozone content and efficiency, the discharging behavior and performance of a plate-type micro-gap ozone generator were studied. 以获得高效率高浓度臭氧为目标,研究了平板式微间隙臭氧发生器的放电特点和性能。
- Any of various halocarbon compounds consisting of carbon,hydrogen,chlorine,and fluorine,once used widely as aerosol propellants and refrigerants. Chlorofluorocarbons are believed to cause depletion of the atmospheric ozone layer. 含氯氟烃由碳、氢、氯及氟构成的卤烃化合物,曾经作为喷雾容器中推进剂及致冷剂被广泛使用,含氯氟烃被认为会导致大气臭氧层的枯竭
- In April 1991,the U.S. Environmental Protection Agency (EPA) reported that atmospheric ozone concentrations above the United States decreased by 4 to 5 percent during the 1980's,three times faster than during the 1970's. 在1991年4月,美国环保局报告说,美国上空的大气臭氧浓度在20世纪80年代下降了4%25-5%25,较70年代加快了3倍。
- It has two components: first, halt or reverse growth of air pollutants, specifically soot, atmospheric ozone and methane; second, keep average fossil-fuel carbon dioxide emissions in the next50 years about the same as today. 这包括两部份:第一,空气污染停止成长,甚至是负成长,尤其是煤烟、气层臭氧与甲烷;第二,未来50年,化石燃料的二氧化碳平均排放量要维持与今日相同。
- Any of various halocarbon compounds consisting of carbon, hydrogen, chlorine, and fluorine, once used widely as aerosol propellants and refrigerants. Chlorofluorocarbons are believed to cause depletion of the atmospheric ozone layer. 含氯氟烃由碳、氢、氯及氟构成的卤烃化合物,曾经作为喷雾容器中推进剂及致冷剂被广泛使用,含氯氟烃被认为会导致大气臭氧层的枯竭
- In April 1991, the U.S. Environmental Protection Agency (EPA) reported that atmospheric ozone concentrations above the United States decreased by 4 to 5 percent during the 1980's, three times faster than during the 1970's. 在1991年4月,美国环保局报告说,美国上空的大气臭氧浓度在20世纪80年代下降了4%25-5%25,较70年代加快了3倍。
- Fire extinguishing chemical halon will be prohibited to use by 2010 due to its damage to the atmospheric ozone layer.Therefore,many countries have make great efforts to study and find its substitutes. 卤代烷1301灭火剂由于对大气臭氧层的破坏作用,将于2010年停止生产。
- Atmospheric ozone precursors, besides methane, especially nitrogen oxides and volatile organic compounds, must be reduced to decrease low-level atmospheric ozone, the prime component of smog. 大气臭氧的前驱物(除了甲烷),如氮氧化物与挥发性有机化合物尤其必须减少,以降低大气层低层的臭氧,即烟雾的主要成份。
- measurement of atmospheric ozone 大气臭氧测量
- The Remediation of Atmospheric Ozone Depletion 大气臭氧耗损的修复
- LET lower atmospheric ozone pollution 低层大气臭氧污染
- Teaching content should be concise. 教学内容要少而精。
- Scientists say a decrease in the amount of atmospheric ozone, 科学家说,大气中臭氧量的减少
- He is quite content with his present fortune. 他对自己目前的境遇颇为得意。
- What's the atmospheric pressure today? 今天的气压怎么样?