Cities are also a major source of greenhouse gas emissions. And those on the coasts face the risk of rising sea levels associated with climate change.
城市也是温室气体排放的主要来源之一，而那些沿海的城市也在面临着气候变化所带来的海平面上升的风险。
The researchers used water and an ultrasonic extraction process, followed by gas chromatography-mass spectrometry to quantify the amount of cocaine in more than 230 bills collected in 17 cities.
研究人员从17个城市收集到230张纸币样本，并使用水和超声波提取方法，再加上气相色谱分析-质谱法对样本进行测试。
That urban growth—roughly half of humanity already lives in cities for the first time in recorded history—may lead to a big increase in greenhouse gas emissions.
有史以来，居住在城市里的人口粗略达到了整体人口的一半，这种城市扩张可能会导致温室气体排放的猛增。
Find the cheapest gas prices in hundreds of cities across the US. The site lists the average gas price for a city along with the address of specific places which offer prices below the city average.
汽油价格网站，在全美境内数以百计的城市中找到最便宜的加油站，可以显示某市中低于该市平均汽油价格的加油站。
She concluded that cities are falling short in two areas: preparing for the likely impacts of climate change and cutting their own greenhouse gas emissions by reducing fossil fuel use.
她总结说城市在以下两个方面做得不够：为气候变化的可能影响做的准备不够以及通过减少矿物燃料的使用来减少它们自身温室气体的排放做得不够。
A pipeline planned for west Africa, which will carry gas that is now flared off in oilfields, could stabilise electricity supply in coastal cities.
在西非国家已经筹备好了一项管道计划，该计划将把目前油田到处泄漏的气体燃料输送到西非各个国家，它将对沿海城市的电力供应起到稳定的作用。
Commercial production in Changbei began in March 2007, supplying three billion cubic meters of gas a year to Beijing and other cities in eastern China.
长北气田的商业生产开始于2007年3月，每年为北京和中国东部城市供应30亿立方米的天然气。
N2O4 NO2 which is a gas, to 2 NO2, which is a gas, the kind of reaction that happens when you have smog and, fairly common in big cities.
的反应，Which，is，the，reaction，of，N2O4，也是气体等于2个，也是气体这是烟雾里,经常发生的反应，在城市里很常见。
In big cities (especially Beijing, in preparation for the Olympics), coal-fired heating and power plants are having to be modified to run on natural gas.
在大城市(尤其是北京，为奥运会做准备)，烧煤供热和电厂正被改造使用天然气。
A major disadvantage of coal combustion-and characteristic of industrial cities-has been air pollution by soot, dust, ash, exhaust and large amounts of the greenhouse gas carbon dioxide.
煤炭燃烧的主要缺点——也是工业城市的特色——是烟尘、粉尘、灰渣和废气以及大量的温室气体二氧化碳污染了空气。
Neighbors are saying that they are ready to leave their apartments in the cities and stay in the village if only water, gas and electricity were available.
邻居们说他们准备好在水，气和电接通后离开他们城里面的公寓并留在这里。
Like a growing number of cities, Paris has drafted a climate action plan to cut greenhouse gas emissions.
跟越来越多的城市一样，巴黎已经起草了一份气候行动计划削减温室气体排放。
But China which began importing turkmen gas last year would prefer to secure a new source of supply closer to cities on its eastern seaboard.
但去年开始从土库曼斯坦进口天然气的中国，会更愿意获得一个离东部沿海城市更近的天然气供应新来源。
Carbon monoxide levels in cities have been greatly reduced by the use of catalytic converters in cars, which turn most of the gas into carbon dioxide.
由于大量使用催化转化器将汽车尾气转换成二氧化碳，城市中的一氧化碳含量已经大大减少。
Beijing and other cities have tried to improve air quality by switching power plants from coal to natural gas and rolling out fleets of electric buses and taxis.
北京和其他城市尝试通过将发电厂由燃煤型转换到天然气燃烧以及推出电动公交和出租车的方式改善空气质量。
This product has been sold to some Car Exhaust Gas Testing Labs and other related repairing enterprises in the Changjiang River delta and Southern cities of China.
产品已经销往长三角洲以及华南地区城市的尾气检测机构及相关的修理企业。
It brought a new, safe light to the gas lit cities and candlelit countryside.
它给点煤气灯的城市和点蜡烛的乡村带来了一种安全的新光源。
US program "Clean Cities" has saved 375 million gallons of gas in 2007, twice the savings reported in 2006.
美国“干净的城市”计划，在2007年已省了三亿七千五百万加仑的汽油，所节省的量是2006年的二倍。
In the meantime, more often than not, the roads in big cities are jammed with cars and the air is filled with exhaust gas.
同时，在大城市里公路越来越多地被汽车堵塞，空气里充满了废气。
Greenhouse gas emissions associated with the lifecycle of the buildings and infrastructure of cities today should be taken into account during planning and approvals.
在现今的城市规划和审批过程中，应考虑到城市建筑和基础设施的生命周期以及与其相关的温室气体排放量。
At present, 8 cities in Hunan have used gas, including 750,000 consumers in Chang-Zhu-Tan area.
目前湖南省已有8个城市使用天然气，长株潭已有75万用户。
The joint seasonal peak-shaving of natural gas transmission and distribution systems from the same gas source through the same transmission pipeline in multiple cities is discussed.
讨论了由同一气源、同一条输气管道供气的多城市输配系统的联合季调峰。
Pollution caused by discharge of motor tail - gas has become the biggest polluting source in cities. Improving the quality of fuel can effectively control the deleterious agent discharged by motors.
汽车尾气排放污染已居城市污染源之首，提高燃油质量可有效控制汽车有害物排放。
He arrived at the Conference in a rickshaw powered by compressed natural gas, which is a far cleaner alternative to the fuels that make Delhi one of the most polluted cities in South Asia.
他乘坐由压缩天然气驱动的三轮车参会，这种能源是化石燃料的更为清洁的替代品，而化石燃料使德里成为南亚污染最重的城市之一。
He arrived at the Conference in a rickshaw powered by compressed natural gas, which is a far cleaner alternative to the fuels that make Delhi one of the most polluted cities in South Asia.
他乘坐由压缩天然气驱动的三轮车参会，这种能源是化石燃料的更为清洁的替代品，而化石燃料使德里成为南亚污染最重的城市之一。
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