多年来

In GIS, data quality is one of the key aspects.The Recent studies of data quality in GIS most focus in the error of spatial data. The error study on attribute data is very weak. Most studies centralize in precision analysis of attribute data from remote sensing and introduction of new method. The studies of attribute information quality stored in RDB are very weak.

近年来，GIS数据质量的研究集中在位置数据的误差上，而对属性数据误差的研究较少，多年来的研究主要集中在遥感分类属性数据的精度分析和一些新方法的引入上，而关系数据库存储的属性信息质量方面的研究相对比较薄弱。

The factory has been found for more than ten years. Specialized in manufacturing car audio in series of car cassette player with radio,CD,VCD,MP3,SUNVISOR DVD and so on. The operation of our company is development, manufacture and sales.

歌亮公司十多年来专业开发、生产和销售汽车收放卡带机、CD、VCD、MP3以及遮阳板DVD等汽车音响系列，拥有先进的生产设备，现代化的厂房，高效的运作模式。

This is the key of the essay, and also the essence of the author's teaching experience of years.

这是本文的关键，也是作者多年来的教学实践经验总结。

DME,as a kind of alternative fuel of diesel engine,has been researched by the worldwide engine researchers for many years and a profound understanding of the spray,autoignition,and combustion process of DME has been acquired.

多年来各国对DME作为柴油的代用燃料作了大量的研究，对DME的喷雾过程、自燃着火过程和燃烧过程等方面有了较为深入的了解。

Over the years, the company is committed to the automated control system design and development.

多年来，公司致力于自动化控制系统的设计，开发。

After more than twenty years of development,the villagers' autonomous system of our country has obtained tangible result.

我国的村民自治制度在经历了20多年来的发展后，已取得了明显的成效。

The achievements, which avant-courier deeply studying the Essence of five Zang in TCM have got, make us learn them more and more.

多年来 ，对中西医结合的藏象实质展开深入研究的各位先驱所取得的成绩，使我们一步一步地揭开中医藏象实质的面纱。

Over many years, the cement industry value did not rise along with the society average value.

多年来水泥行业价值没有随着社会平均价值的增长而增长。

This axiomatic method has been the model for many systems of rational thought, even outside mathematics, for over 2,000 years.

这种公理方法是2，000多年来许多理性思想体系的模范。

In principle this standard is a self developed automatic balance bridge,in which its resistance arms can be changed automatically,and is used for the calibration of the RF voltage.

我国于1980年建成射频电压基准[1]，20多年来，它在保证射频电压计量器具的量值准确和统一的工作中做出了宝贵的贡献。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。