本文通过对清代到民国时期鄂尔多斯垦殖的全面研究，剖析了农业垦殖活动对该地自然环境的影响。
The dissertation comprehensively studied the reclamation of the undeveloped land in Ordos region from the Qing Dynasty to the Republic of China, and analyzed its influences on the local environment.
此书在清代复现，对“比兴寄托”说词论产生了较大影响。
The reappearing of this book in Qing Dynasty has a big influence on the growing of Bailment theory.
这样选定研究范围一是便于资料的收集，另外一个原因在于清代后期，社会动荡，生产破坏，国力衰弱，反而影响了社会保障的实施。
One reason is easy to collect the information, other is impact the implement of social security in latter period because of the society turbulence, production wreck, national power decline.
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