文章从社区和社区研究的概念及特点入手，以摩尔根在塞纳卡部落和其它印第安部落所做的实地调查来论证这一观点。
To this end, the paper discusses the concepts and characteristics of community, and community study, based on morgon ' s investigations into the seneca and other native american tribes.
在对重庆城口县主要农作物和野生经济植物进行实地调查的基础上，确定以8种主要资源植物为研究对象，对其含硒量及其分布进行了系统研究。
Based on an on - the - spot survey of the cultivated plants and economically - important wild plants in Chengkou county, Se content in 8 main resource plants was determined.
本文力图在前人研究的基础上，以20世纪上半期上海城市郊区农家生活状况的文献记载和实地调查为基础，对这一时期沪郊农家生活状况作出评估。
This article is based on the formal instigations and documentary records of the early 20th century, and makes an evaluation of the living conditions of the peasants in the suburbs of Shanghai.
应用推荐