executives and sales agents for these companies estimate that sales of air-purifying machines have more than tripled over the past month as northern china has been hit by air pollution emergencies.

the local and regional distribution of pollutants is significantly influenced by weather patterns and variability along with the spatial patterns of emissions.

地区性的空气污染分布显著的受空气模式及排放特性及变化所影响。

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under the plan, china aims to cut air pollution in some of the worst affected areas including beijing by 2017.

根据计划，中国旨在2017年前消除污染最严重地区的空气污染，包括北京。

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an analysis on in-car air pollution source and the method of air quality assessment

轿车车内空气污染源的分析及其空气品质的评价方法

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in the study, pregnant rats and their offspring were placed in two chambers-one exposed to filtered air that removed most of the air pollution particles and the other to beijing's highly polluted air.

研究中，怀孕小鼠及其后代被分置于两室，一组接触的是滤净大部分污染颗粒物的空气，另一组暴露于北京污染严重的空气中。

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how to prevent and control the indoor air pollution should be consider the time before and after decoration.

预防、控制装饰污染引起的室内空气污染应该从装修前和装修后两个阶段来考虑。

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this is covered by an upper layer of warm air that acts like a lid. it prevents the polluted cooler air from rising.

这层冷空气就阻挡了这些被污染的冷空气，使之不能上升的高空中。

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the view has been taken by some that plants may in fact cleanse polluted air, even as they are being injured.

有些人认为，植物纵使被伤害，仍能净化污染了的空气。

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the assessment of single element can not produce satisfactory result because the air components polluted are very complicated, therefore every factor should be taken into consideration in the assessment.

受到污染的空气其成份比较复杂，采用单因素评价是得不到满意结果的，必须同时综合考虑多方面的因素。

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conclusion this outbreak of brucellosis among people maybe resulted from indirect transmission of brucella through dust in the air, which was contaminated by infectious sheep.

结论本次布氏菌病人间暴发可能是由染疫羊通过污染的空气尘埃，间接传播给人导致的布氏菌病暴发。

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breathing contaminated air, eating contaminated food or soil, or drinking contaminated water are ways people can be exposed to lead.

呼吸污染的空气、摄取污染食品、接触土壤、或喝了污染水，都是人们暴露于铅的途径。

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it is possible, still, to breathe an air untainted and to hear the whispered passage of time.

你可能仍然可以吸一口未经污染的空气，并聆听时光流逝所发出的嘶嘶絮语。

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reverse brayton air refrigerator was efficiently used in the refrigeration and cryogenic field in recent years, and because of the restriction of cfcs, it will be used more widely.

采用逆布雷顿循环的空气制冷机在普冷和深冷领域得到了越来越广泛地应用，而且随着国际上对CFCs工质的限制，对环境无污染的空气制冷机具有更加广阔的应用前景。

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global overheating will also bring drought, famine and disease to inland communities everywhere on earth.

全球过热还会给全球内陆地区带来干旱 、 荒和疾病.

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at this time most of the country sees clear skies most days.

而内陆地区则是冬冷夏热的大陆性气候.

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most of the grassland in the inland areas.

草原多数位于内陆地区.

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inland area, because lack open engine, with coastal city group difference is increased gradually.

内陆地区, 因缺少开放的引擎, 与沿海城市群的差距逐渐加大.

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shower and wu kuang terrace, quiet shift gate.

淋浴房，无框阳台，静音移门。

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this phone features a shift gate on its posterior instead of a brake pedal on the previous model and costs $25k.

这款手机背部采用滑动门，而不是前一版本的制动脚踏。价格$25,000。

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we demonstrate here the implementation of the conditional phase-shift gate using transition selective pulses.

我们在这里展示的实施条件相移门使用过渡选择性脉冲。

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beethoven to his immortal beloved

贝多芬写给“永远的爱人”

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