尾气

To improve the quality of fuel: ethanol in gasoline motor ethanol is a renewable form of energy, but also is an excellent quality of the gasoline improver.

降低尾气有害排放：汽车有害尾气的排放，特别是在人口密度较大、车流量较大的区域和城市，已成为一种严重的环境污染源。

The concentrations of isopentane, 2-methyl-pentane, pentane and 3-methyl-pentane which are from automobile exhaust and gasoline evaporation were highest in alkanes. Benzene/toluene ratio was close to 0.5 which is the characteristic value of automobile exhaust. The concentrations of pinene and isoprene were highest in alkenes.

烷烃类物质中异戊烷、2-甲基戊烷、正戊烷和3-甲基戊烷等机动车尾气或汽油挥发特征性物质浓度最高；芳香烃类物质中苯／甲苯的特征比值略高于机动车尾气排放特征比值0.5；烯烃类物质以植物排放的蒎烯、异戊二烯为主。

In this paper, the studies on the preparation of high pure mesitylene usingMTBE tail gas are made in both experimental and theoretical, different factorsaffecting the alkylation reaction to produce mesitylene by MTBE tail gas areinvestigated, the optimal condition of reaction is defined and the alkylationreaction kinetics of different components are studied, moreover, the comparisonbetween C4 raffinate oil and isobutene used for alkylation agent is made too.

本文对MTBE尾气烷基化法制备高纯度均三甲苯过程进行了实验研究和理论分析，确定了不同因素对烷基化反应的影响，得到了MTBE尾气制备均三甲苯的最佳反应条件，并对不同组分的烷基化反应动力学进行了研究。此外，对乙烯C4抽余油和异丁烯做为烷化剂的实验结果进行了分析和比较。

The radiogenic lead of coal fly ash is obviously higher than that of gasoline and diesel oil, which can serve as the discrimination criterion to distinguish the aerosol lead sources.

铅同位素含量数据表明成都市近地表大气尘的铅污染是复合污染源所致，其中，相对清洁区污染以建筑扬尘为主，中度污染区是汽车尾气和扬尘的叠加作用，重污染区是燃煤飞灰汽车尾气和工业污染源的综合表征。

This paper presents the integration of these technologies to monitor vehicle exhaust gas real time, and to create the map of monitoring vehicle exhaust gas in the city.

本文描述了这种技术的有机结合，用来实时监测城市汽车尾气的监测系统，可以创建与GIS技术结合的城市汽车尾气污染的实时监测地图。

Use of exhaust purification system remove exhaust residue that may occur to prevent the vacuum system is contaminated.

使用的尾气净化系统清除尾气中可能出现的残余物，防止真空系统被污染。

The production method and processing conditions of sulfur,sodium hyposulfite, sodium hydrosulfide and thiourea from hydrogen sulfide tail-gas in the production of barium carbonate by carbonation method are introduced.

介绍了利用碳化法生产碳酸钡的硫化氢尾气生产硫磺、硫代硫酸钠、硫氢化钠和硫脲的生产方法和工艺条件，指出硫化氢的综合利用生产工艺简单，产品质量稳定，容易工业化，产品成本低，同时消除了硫化氢尾气对环境的污染，有巨大的经济效益和社会效益，发展前景非常广阔。

The process improvement of flaky sodium hydrosulfide production;2. The production method and processing conditions of sulfur,sodium hyposulfite, sodium hydrosulfide and thiourea from hydrogen sulfide tail-gas in the production of barium carbonate by carbonation method are introduced.

介绍了利用碳化法生产碳酸钡的硫化氢尾气生产硫磺、硫代硫酸钠、硫氢化钠和硫脲的生产方法和工艺条件，指出硫化氢的综合利用生产工艺简单，产品质量稳定，容易工业化，产品成本低，同时消除了硫化氢尾气对环境的污染，有巨大的经济效益和社会效益，发展前景非常广阔。

A new kind of thermopile sensor system for vehicle exhaust gas monitoring was designed,aiming at new emission standards and measurement methods of vehicle exhaust gas.

针对汽车尾气新的排放标准和检定方法的实施，设计了用于汽车尾气监测的热电堆传感器系统。

A new kind of thermopile sensor system for vehicle exhaust gas monitoring wasdesigned, aiming at new emission standards and measurement methods of vehicle exhaust gas.

针对汽车尾气新的排放标准和检定方法的实施，设计了用于汽车尾气监测的热电堆传感器系统。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。