请教如下一句英文该如何分析?

题目

请教如下一句英文该如何分析?
To this list of fields should be added space technology,which is being used to su-rvey the surface and even he subsurface of the earth from satellites,space shuttl-es,and airplanes.
请教各位前半句的to……好像也不是不定式,是怎么作主语的呢?主句该如何分析?

答案

我感觉正常语序应该是 Space technology should be added to this list of fields ,which is being used to su-rvey the surface and even he subsurface of the earth from satellites,space shuttl-es,and airplan...