二氧化硫是一种污染物，并且是形成酸雨的主要因素。
Sulphur dioxide is a pollutant and a major contributor to acid rain.
这种情况似乎是由许多因素的累积的结果，而大气污染物是主要的罪魁祸首。
The condition appears to result from the cumulative effect of a number of factors, with atmospheric pollutants the principal culprits.
应对主要的风险因素(包括营养不良和室内空气污染)与接种疫苗和母乳喂养一样，对预防肺炎是至关重要的。
Addressing the major risk factors - including malnutrition and indoor air pollution - is essential to preventing pneumonia, as are vaccination and breastfeeding.
烟草使用、室内外空气污染与职业灰尘和化学品是主要的高危因素。
Tobacco use, indoor and outdoor air pollution and occupational dusts and chemicals are the primary risk factors.
水质下降是在大堡礁污染的主要因素。
Declining water quality is a major factor in the pollution of the Great Barrier Reef.
调查显示，不断增加的生活开销，巨大的工作压力，环境污染和拥挤的公共交通是促使他们离开的主要原因——不断飙升的房价则是首要因素。
Rising living costs, enormous work pressure, pollution and crowded public transport are the major reasons they want to leave - escalating housing prices top the list, the survey said.
虽然在咳嗽和打喷涕时通过大的飞沫传播被认为是主要的流感传播途径，但是通过受污染的手传播可能是一个促进因素。
Although transmission by large droplets when people cough or sneeze is considered the major route of influenza spread, transmission via contaminated hands may be a contributing factor.
以上各感染源对疾病总负担的相对贡献情况目前还不清楚，但食用未煮熟的受污染家禽被认为是一个主要因素。
The relative contribution of each of the above sources to the overall burden of disease is unclear but consumption of undercooked contaminated poultry is believed to be a major contributor.
过去对于小白鼠的研究中发现空气污染对于胰岛素的抵抗性有很大关系，这是第二类糖尿病的主要发病因素。
Previous studies in mice have suggested that air pollution is associated with insulin resistance, a precursor condition to type 2 diabetes.
显然，空气污染是导致雾霾天气经常出现的主要因素。
Obviously, air pollution is the main factor that has resulted in the frequency of hazy weather.
破旧的公交车是造成英国城市污染的主要因素。
Old buses are major contributors to pollution in British cities.
论文还讨论影响沉积物分布的主要因素和按区域划分(北部、中部、南部)的污染特点。
We have also discussed the main factors influencing the distribution of sediments and the pollution characteristics and effects on regions (the north, the middle and the south of coast).
调查表明，企业的生产经营活动是导致环境污染的最为主要的因素之一。
The survey showed that one of the most major factors of environmental pollution is the production and operation activities.
掌握城区雨水径流水质及其主要的影响因素是有效地利用城区雨水资源和控制城市非点源污染的基础。
It is a critical basis for utilization of rainfall resource and pollution control of runoff in urban area to understand runoff quality and its main influential factors.
肥料是粮食增产的主要因素，但化肥施用不当加剧了环境污染，特别是通过蔬菜积累直接危害人类健康。
Fertilizer is the main factor for the harvest of crops, but its irrational application brings environmental pollution, further harmful to mankind through its accumulation in vegetables.
影响痕量氯分析的主要因素为电极污染及参考电极失效。
The main factors influencing trace chlorine are electrodes pollution and the invalidation of the reference electrodes.
结果表明，细粒子的污染比较严重，是影响能见度的主要因素。
Results show that pollution of fine particles was relatively serious and it is the major factor that influences visibility.
结果感染主要因素为环境微生物污染；人体携带条件致病菌；口腔黏膜损害与感染以及深静脉置管感染等。
RESULTS the environmental microbiology pollution, carrying opportunistic pathogens, oral mucosa damage, deep venous catheterization and others were the main related factors of infection.
这种不确定性主要来自于经济的投入和产出结构、污染治理投入和环境政策等因素的综合作用结果。
The uncertainties come from synthetic action of input and output structure, investment of pollution control, environment policies, etc.
本文分析了铁路运输和汽车运输对城市环境的主要作用途径和交通污染水平的影响因素；
The primary ways in which railway transport and highway transport have effects on urban environment and factors affecting traffic pollution level are discussed.
在税收征税范围确定的情况下，税率是影响污染税征收效果的主要因素。
Taxation rate is the key factor to influence the utility of pollution taxation under the condition that the taxation levy scope is determined.
降雨径流是形成非点源污染的主要影响因素。
Rainfall runoff is the main factor affecting the formation of nonpoint pollution.
众所周知，全球水资源短缺的问题越来越严重，主要是因为全球变暖，环境污染等因素所致。
As we know, the global water shortage in becoming increasingly severe mainly due to global warming, environmental pollution and the ever-increasing population.
在回转窑煅烧石油焦的过程中，大量的高温烟气和比较严重的粉尘是污染环境的主要因素。
There will be a lot of high-temperature smoke and serous power pollution in the production of petroleum coke calcined by rotary oven.
采用一体化微滤膜生物反应器处理洗浴污水，探索影响膜污染的主要影响因素。
An integrated membrane bioreactor is used for treating bath wastewater test and researching main factors to influence membrane pollution.
本文对滨海湿地退化的主要原因进行了分析，指出围垦、城市与港口开发、污染及生物资源过度利用是造成滨海湿地退化的主要因素。
Land reclamation, city and port development, pollution and excessive use of coastal biologic resource are considered as the main environmental forcing factors to the degradation of coastal wetlands.
沉积物的粒度是控制沉积物中污染物分布的主要因素之一。
Grain size is one of the main factors to control the pollutant distribution in sediment.
沉积物的粒度是控制沉积物中污染物分布的主要因素之一。
Grain size is one of the main factors to control the pollutant distribution in sediment.
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