To sum up,there are three most important and universal aspects as follows:1)master both the target language(TL)and source language(SL)very well,and can use them freely;2)be well-prepared and can translate easily between the TL and Sl;3)persevere in their efforts to translate and b.

The paper discusses that how to get graphic information from the autoCAD articles with these methods, such as nearest entity method, maximum rectangle method, intersection method with vector , angle-off set method with vectors .