The composition and levels of air pollution vary from place to place.
空气污染的成分和程度在各个地方都不尽相同。
Engine noise is the major noise source of automobile; air power noise is one of composition parts of engine noise.
发动机噪声是汽车的主要噪声源，空气动力噪声是发动机噪声的组成部分之一。
Plato's Timaeus conjectures on the composition of the four elements which the ancient Greeks thought made up the universe: earth, water, air, and fire.
柏拉图的《提马亚斯》推测古希腊人认为宇宙由四种元素组成：地，水，风，火。
The effects of the feed rate of air, steam and coal on bed temperature, gas composition, calorific value, carbon conversion and gasification efficiency are predicted and analyzed with the model.
在此基础上，还就空气加入量、蒸汽加入量及加煤速率对床温、煤气组成、煤气热值、碳转化率和气化效率的影响做了预测和分析。
This paper presents operation, structural composition and design method of air - cushion floating devices, as well as application in hoisting and conveying machinery.
概述气垫悬浮技术和装置的主要工作原理、结构组成、设计要点及其在起重运输机械方面的应用。
Objective: To evaluate the influence of air oxidation, anodizing and tin coating sample on elemental composition and thickness of surface film of cast pure titanium.
目的：评价大气热氧化、阳极氧化和氮化钛镀膜对铸造纯钛表面膜组成和厚度的影响。
The composition of main air blower set of catalytic cracking unit. The different types of blower and its different inlet pipe system arrangement were recommended.
介绍了催化裂化装置中主风机机组的组成，以及不同型式的鼓风机其入口管系的不同配置。
A system composition and design consideration of a pressurized room is present in this article and it is emphasized two parts: pressurized control system and air duct system for this room.
文章介绍了正压房间的系统组成及设计，着重阐述了正压控制系统和风道系统两部分的设计。
Although PM2.5 is only a few components content of earths atmospheric composition, but it has important effect on visibility and air quality etc.
虽然PM 2.5只是地球大气成分中含量很少的组分，但它对空气质量和能见度等有重要的影响。
Described are the composition and operation principles of air compressors and air driers in the air source system on metro trains with autonomous intellectual properties.
介绍了自主知识产权地铁列车风源系统空气压缩机和干燥器的组成及作用原理。
II. Air transport: transport mode, Master Air Waybill (MAWB) and House Air Waybill (HAWB), centralized shipping and distribution, freight composition and calculation skills;
航空运输：运输方式；主运单与分运单，集中托运与分拨，运价组成与计算技巧；
The operation of the engine at various values of mixture composition yields characteristic curves for the ion current and for the fluctuations in the ion current as a function of the air number.
在混合组成的产量为离子电流特性曲线，并在离子作为当前空气的函数值的波动的各种行动的引擎。
By studying the mix of gasses inside the air, scientists can follow changes in the composition of the earths atmosphere.
通过研究气泡内混合的气体，科学家们就能对地球大气成分的变化有所了解。
The composition of air intake system of EMS for motorcycle, including the air metering and controlling proposals are introduced in this paper.
本文介绍了电喷摩托车进气系统的组成以及电喷系统对空气进气量的计量和控制方式。
The major factors that influence isotopic composition of cave drip water are mean annual air temperature, mean annual rainfall and change in moisture source.
影响洞内滴水的稳定同位素组成的因素主要是年平均气温、年降雨量以及降水气团的来源的变化。
The paper describes the composition, protection function, control principle, system communication, collection of system signals and design idea of the PLC system of air compressors.
介绍了空气压缩机PLC控制系统组成、保护功能、控制原理、系统通信、系统信号的采集，以及控制系统软件设计思想。
The composition and principle of air leakage control system of rotary air preheater based on PLC and various functions of software developed in this air leakage control system are described.
叙述了基于PLC的回转式空预器漏风控制系统的组成、工作原理及软件的各项功能。
This paper gives introduction of the composition, construction forms of key components and testing results for the freezing-type compressed-air purification plant.
本文介绍了冷冻式压缩空气净化装置的组成、关键部件的结构形式及其试验结果。
This paper reviews the odor and main composition of rose type, and draw out formulation of rose type in accordance to the character of gel air freshener.
本文论述玫瑰的香气组成及主要成份，并依据香座特点，拟订玫瑰香精配方。
Summary calm path is revulsive system of fan air conditioning is a kind of new-style air conditioning system, the article introduced his main job principle and composition.
提要无风道诱使风机空调体系是一类新式的空调体系，此文透露了其基础工作元理和构成。
Finding the correct gas-air ratio in producer gas drive engine is difficult as gas composition changes over a run, sometimes drastically.
发现生产者气驱发动机正确的气体，空气比过去困难，运行气体成分的变化，有时会大幅下降。
In the study of varying composition capacity control air conditioning system with ternary mixtures, the calculation of the mixture's properties is significant and complicated.
在三元非共沸混合工质变成分容量调节空调研究中，工质热力性质的计算不仅关键而且相当复杂。
The variations of lower heating value, theoretical air fuel ratio and combustion potential of natural gas fuel were investigated according to the variation of natural gas composition in China.
根据中国天然气组分变化的情况，研究了天然气组分变化时，燃料的低热值、理论空燃比和燃烧势等燃烧参数的变化；
By analyzing on composition and formation mechanism of ash deposit, the measures of decreasing salt and heavy metal contained in fuel oil and waste liquid and appropriately decreasing excess air co...
分析了积灰的组成和形成机理，提出了减少燃料油和废液中的盐分和重金属、适当降低燃烧的过剩空气系数等措施。
The paper introduces the composition and operating situation of natural stratified water storage air conditioning in Nanning Wharton International Hotel and does economic analysis.
介绍南宁沃顿国际大酒店的自然分层的水蓄冷空调的构成及运行情况，并进行了经济性分析。
The indoor air quality of subway is potentially affected by ventilation facility, quality of fresh air, depth of station, and airflow composition.
通风设施、新风质量、站台地层深度、气流组份对地铁车站室内空气质量均会产生一定影响。
The indoor air quality of subway is potentially affected by ventilation facility, quality of fresh air, depth of station, and airflow composition.
通风设施、新风质量、站台地层深度、气流组份对地铁车站室内空气质量均会产生一定影响。
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