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国家二级
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  national secondary
    We introduce the objective and methods of SSDL participating in TLD international intercomparision organized by IAEA/WHO, and summarize the intercomparision results of national secondary dosimetry standard for 60Co radiotherapy level in 1989-2006.
    介绍二级标准剂量学实验室(SSDL)参加国际原子能机构(IAEA)和世界卫生组织(WHO)组织的SSDL间TLD国际比对的目的和方法,并对60Co放疗水平国家二级剂量标准1989-2006的比对结果进行总结。
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    The series of China standard seawater are the national secondary reference mater ial of China [GBW (E) 130011], which is extensively applied in the in-situ ver ification of the salinity or conductivity sensors and the verification or calibr ation of lab salinometer This paper introduced mainly the preparation and unce rtainty analysis of the series of standard seawater
    中国系列标准海水是国家二级标准物质 [GBW (E) 130 0 11],在盐度或电导率传感器的现场检定 ,实验室盐度计的检定和校准中应用广泛。 主要介绍中国系列标准海水的制备和不确定度分析。
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    It was found that both indoor and outdoor particulates concentrations(PM10 and PM2.5) exceeded the concentration limits given by the national secondary standard and the American secondary standard,respectively.
    结果表明,室内外颗粒物浓度严重超标,PM10和PM2.5分别超过了我国国家二级标准和美国二级标准。
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    The leachate treatmetn system with capacity of 70 m~3/d using the aged refuse reactor as the principal part was put into operation in September 2004. The operation result shows that the effluent COD concentration can come up to the national secondary discharge standard with BOD_5,NH_3-N,TP,SS,and coliform up to the national primary discharge standard,and the operating cost is 3 yuan/m~3.
    2004年9月以矿化垃圾反应床为主体的规模为70 m3/d的渗滤液处理系统在山东省即墨市垃圾填埋场正式运行,其出水COD浓度可达到国家二级排放标准,BOD5、NH3-N、TP、SS和大肠杆菌等指标均达到国家一级排放标准,系统运行费用约为3元/m3。
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    Chrysolophus pictus is the national secondary protected animals.
    红腹锦鸡(Chrysolophus pictus)是国家二级保护动物。
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    The experimental result shows that COD in raw water can be reduced from 860 mg/L to 145 mg/L and the removal rate of COD in wastewater can reach 83.1%. After the treatment,the effluent is good enough to meet the 2nd grade of national wastewater discharge standard.
    研究结果表明:采用混凝—催化氧化工艺可使原水的COD从860 mg/L降至145mg/L,去除率83.1%,出水达到国家二级排放标准。
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    METHODS:Totally 6 high level women distance-runner in university (national grade 2 athletes) were randomly divided into 2 groups from January to December 2005 for the experiments for 80 days:experimental group (n =3) and control group (n =3).
    方法:2005-01/12选择大学高水平长跑女运动员(国家二级运动员)6名,随机分为实验组3名,对照组3名,以80d为1个周期进行实验。
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    The results showed that the fine particle pollution in air in Beijing was serious and especially in the heating period, the concentration of PM10 was far greater than the national second class standard.
    研究结果表明,北京市大气中细微颗粒物污染较严重,尤其在采暖期,PM_(10)的测定结果远远超过了国家二级标准。
    International intercomparison result of secondary dosimetry standard for ~(60)Co radiotherapy level
    ~(60)Co放疗水平国家二级剂量标准的IAEA/WHO国际比对
短句来源
    d ,the effluent quality always meets the need of national discharge standard II (GB8978-1996) .
    d时,出水完全能够达到国家二级排放标准(GB8978—1996);
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  national secondary
The databaserefers to the population of all secondary education graduates taking (ornot taking) the June 2000 national secondary school examination.
      
Despite significant and sustained gains recorded on the national secondary school leaving examinations between 1999-2004, South Africa's large-scale secondary school reform has receive little international attention.
      
Herein, two national secondary data bases are reviewed: the Area Resource File (ARF) and the Healthcare Cost and Utilization Project (HCUP).
      
Using data from national secondary market institutions, this paper estimates a competing risks proportional hazard model, which includes unobserved heterogeneity.
      
Until 1983, a highly competitive entrance examination was required to be admitted into national secondary schools.
      


A new process as a trial of iron powder production of once- reductionfor powder metallurgy, i. e., the process of chain grate machine-rotary kiln has been done and the technological flow brieflydescribed. The probablity of this new process as put into production isdiscussed and analyzed theoretically, and results by plant test are intro-duced. A series of tests can be verified that the process of chain gratemachine-rotary kiln availabe. The essential expenses of raw materials bynew process are only 1/3 to 1/2...

A new process as a trial of iron powder production of once- reductionfor powder metallurgy, i. e., the process of chain grate machine-rotary kiln has been done and the technological flow brieflydescribed. The probablity of this new process as put into production isdiscussed and analyzed theoretically, and results by plant test are intro-duced. A series of tests can be verified that the process of chain gratemachine-rotary kiln availabe. The essential expenses of raw materials bynew process are only 1/3 to 1/2 of that by prevailing domestic process, andphysical and chemical properties of trial-products by new process havebeen come up to Ⅱ grade of iron powder, National standard. Anthracitecoal as a reducing agent may be taken the place of charcoal by new process,thus extending the source of sorts of reducing agents and saving the retortsof ceramic and sheet iron with the result that a great deal of materialresource and costs would econmized. There exists a fairly good working con-dition than before and then it easily helps to bring about mechanization.Therefoe, such a new process may be considercd as new approach in ourcountry rapidly to develop the iron powder production.

本文简介了用链篦机—回转窑作为粉末冶金铁粉生产一次还原的工艺流程。讨论了采用链篦机—回转窑法生产铁粉的可能性、作了理论分析,介绍了工业试验结果。实验证明采用链篦机—回转窑生产铁粉工艺上可行;主要原、材料消费仅为现有工艺的1/3~1/2;试验产品的理化性能符合国家二级铁粉标准;可用无烟煤等代替木炭作还原剂,扩大了还原剂来源;省去了陶瓷罐和薄铁皮罐,为国家节省大量耐火材料和薄铁皮;劳动条件较好,易于实现机械化,因此链篦机—回转窑法是迅速发展我国铁粉生产的一条新路。

This paper studies the techniques in seedling raising and afforestation of Emmenopterys henryi by analysing measures taken out in nursery site selection, water and light intension regulation, and disease and insect control. Results have shown that high quality seedlings can be produced in nurseries of good water and soil condition and with moderate shading. Full light is unsuitable for seedling raising. The survival rate of afforestation reached over 80% on the rolling land 300-1000m above sea level with thick...

This paper studies the techniques in seedling raising and afforestation of Emmenopterys henryi by analysing measures taken out in nursery site selection, water and light intension regulation, and disease and insect control. Results have shown that high quality seedlings can be produced in nurseries of good water and soil condition and with moderate shading. Full light is unsuitable for seedling raising. The survival rate of afforestation reached over 80% on the rolling land 300-1000m above sea level with thick soil layer well prepared and the nurseries well tendered; the seedlings grew over 20cm in height the same year they were planted.

香果树(Emmenopterys henryi Oliv.)为国家二级重点保护植物,濒临灭绝危险。为了扩大栽培,多年来进行了育苗和造林技术试验研究。在安徽黄山,播种育苗和扦插繁殖获得成功,造林成活率达到80%以上。

This paper summarizes the major environmental problems associated with the development of economy and the exploitation of natural resources in Guangxi Autonomous Region and discusses the origin and development tendency of these problems.Besides, the strategic countermeasures for controlling them are also analyzed. The major environmental problems in Guangxi are determined to be the serious air pollution in urban areas and the high frequency of occurrence of acid rain.These problems have become more and more...

This paper summarizes the major environmental problems associated with the development of economy and the exploitation of natural resources in Guangxi Autonomous Region and discusses the origin and development tendency of these problems.Besides, the strategic countermeasures for controlling them are also analyzed. The major environmental problems in Guangxi are determined to be the serious air pollution in urban areas and the high frequency of occurrence of acid rain.These problems have become more and more severe in the past a few years.In addition, the organic pollution and over exploitation of groundwater, the general increase of environmental noise in cities and the damage of ecological environment are also pressing.The major causes for above environmental problems include: 1 ) Great and concentrated drainage of waste water; 2) Low treatment ratio of waste water and low ratio of those up to the standards over the total treated waste wateri 3 ) Unfavorable environmental factors.In the meantime, insufficient investment in environmental protection, ineffective environmental management and the low utilization ratio of natural resources and energy resources have aggravated the environmental problems.The author suggests to practice such an environmental strategy that making the focal point stand out and taking a policy of comprehensive prevention and treatment . The emphasis should be put on the prevention and control of the air pollution in urban areas. The main task in the period of the 7th Five-Year Plan should be to control the further development of air pollution,and that by the end of this century should be to improve the air quality to the 2nd grade state standards. The forward goals should be to readjust the structure of energy sources ?to progressively increase the ratio of hydroelectric power,while to decrease the use of coal. In the near future,to improve the quality of atmospheric environment in urban areas should be our main goal. The measures include mainly provi -ding low-sulfur high-quality coal to the residenis and increasing the gasification ratio of the coal. Moreover,strenthening environmental management and monitoring, perfecting the local environmental protection law and regulations,augmenting environmental consciousness of the whole nation are always our permanent goals.

本文概述了广西自治区经济发展和资源开发中出现的主要环境问题,发展趋势,并对其产生的原因及控制战略进行了分析.广西主要的环境问题是城市大气的严重污染及酸雨出现频率高,且呈逐年加重的趋势;地下水的有机污染和过量开采;城市环境噪声的普遍增高;生态环境的破坏等。排污强度大且集中,处理率和达标率低,加上不利的自然坏境因素,是造成环境污染的主要原因;而环境保护投资不足,环境管理跟不上,资源和能源利用率低等,促成了环境问题加重。建议采取重点突出,综合防治的环境战略,把主要力量放在解决城市大气污染的防治上。“七五”期间主要控制大气污染的进一步发展;至2000年使城市大气环境质量达到国家二级标准;把调整能源结构,逐步提高水电比例,降低煤的使用量作为远期目标;近期放在改善居民区的大气环境质量上.主要是供应居民低硫优质重煤,提高气化率等.而加强环境管理监督,完善地方环境法规,增加环境保护资金,提高全民族的环境意识,应是始终努力的目标.

 
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