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Nanostructured tin oxides and stannates have been prepared with the help of organic surfactants and been characterized by the use of electron micrography and adsorption technology.

利用有机化合物的模板作用，合成了各种结构的纳米孔材料，并应用吸附测试、高分辨电镜技术对这些材料进行了表征。

Based on the complexity of the sources for the sediments in the Okinawa Trough, the sequential extraction procedure was applied to the hydrothermal influenced sediments in the core H9 recovered from the middle Okinawa Trough. Five fractions, including exchangeable, bound to carbonates, bound to iron and manganese oxides, bound to organic matter, and residual were acquired. Based on detailed analysis for major, minor and rare earth element compositions, the distributions of the elements in various speciations of the sediments were determined and the controlling mechanism was discussed. The variations of hydrothermal signatures in the core, partitioned from the terrigenous, volcanic and biogenic materials, have been demonstrated and the accumulation rates of some elements were evaluated.

本文针对冲绳海槽多种物源沉积作用混杂的特征，采用顺序淋滤萃取方法对海槽中部受热液活动影响的H9岩芯沉积物进行了分离，将沉积物中分为可交换态、碳酸盐结合态、铁锰氧化物结合态、有机结合态和残渣态五个部分，并对各个结合态中常量、微量和稀土元素组成进行了分析，确定了不同元素在不同结合态中分配的比例，分析了控制不同元素进入沉积物的主要机制。

Perovskite oxides (ABO3) has stable structure and high photocatalytic activity ,further morea catalyst which has more narrow band gap can be synthesized and can absorb more solar energy by altering the type of A and B.

钙钛矿型氧化物(ABO_3)不但具有结构稳定，催化活性高等特点，而且可以通过改变A、B原子的类型制备出禁带宽度较窄，能大量吸收太阳光的催化剂。

Metallurgy School, UST Beijing, Beijing 100083, China）ABSTRACT The negative thermal expansion in some complex oxides has beenattributed to transverse thermal motion of A-O-M linkage composed of two-coordinate oxygenbridge bond, and the librationsand tilts of essentially rigid polyhedral blocks in openframework structure. The isotopic NTE materials have been finding moresubstantialapplications in composites and other relative technique fields.

氧化物材料负热膨胀机理邢献然摘要氧化物的负热膨胀性是由于在其开放式的骨架结构中，有二配位的桥氧键产生横向热运动，以及引起的多面体热摆动和耦合作用使非键合M-M1键距变短，导致单胞体积缩小；各向同性NTE氧化物在复合材料及其相关技术领域具有更广泛的应用价值。

The character of the niobium oxides and their catalytic application were reviewed.

综述了含铌氧化物的特徵及其在不同催化过程中的应用。

Niobium oxides are favorable promoter and Support.

铌氧化物是优良的促进剂和良好的载体。

High concentration of sulphur dioxide, nitrogen, oxides and dust have long been known to be harmful.

人们早已知道，二氧化硫、氮、氧化物和尘埃浓度高是有害的。

Global warming is mainly due to human activities, such as greenhouse gases generated by industrial production of nitrogen oxides and carbon dioxide.

全球气候越来越暖的最主要原因就是人类的日常活动，人们在生产的过程中产生大量气体如二氧化碳和氮气等气体。

Sulphur dioxide and nitrogen oxides will mix with water droplets in the air and form acid rain .

二氧化硫和氮氧化合物与大气中的水份结合而成酸雨。

Methane and nitrous oxides produced by agriculture account for about 10% of man-made warming.

农业产生的甲烷与一氧化二氮，在人为导致的全球变暖中，占了约10%。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。