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Along with the development of map projection theory, developing the geographical spatial system also becomes more and more urgent.

论文介绍了利用 ArcObjects 建立空间参照系统的方法，给出了较为详细的实现代码，文字表述也较为简练。

Reports on indications, techniques and results of preserving vagus nerve in the surgical treatment for carcinoma of the esophagus were also introduced.

同时扼要地介绍了食管癌外科治疗中保留迷走神经的适应证、手术方法及效果等有关方面的文献报导，并对保留迷走神经功能的术中，术后检测手段进行了探讨。