Following an investigation into the possibilities ofmaterials including recycled glass, stucco and marble, the architects settled on stone as the best option.
紧接着调查加入材料的可能性，包括再生玻璃、灰泥、大理石，最后建筑师确定石头是最好的选择。
2
Based on some related materials and investigation the paper makes an introduction to distribution of Manchu literatures and involved organizations as well.
本文根据有关文献和调查资料对北京地区满文图书的分布情况及相关的藏书机构进行了介绍。
3
Outside market survey adopted questionnaire investigation, case study, deep interview and the study of second-hand materials etc.