A field survey approach was applied for this research, the first-hand information by investigation on Jingxing mining area of Shijiazhuang was used as the data sources.

采用实地调查的方法，以石家庄市井陉矿区调查的一手资料为数据来源进行研究。

youdao

How to carry out control survey rapidly and effectively in a new or data confused gold mining area is an important problem for gold geological surveyors to resolve.

到一个新的金矿区或者各种资料比较混乱的金矿区如何理顺思路并在短时间内迅速有效地开展控制测量工作，是黄金地质测量工作者要着重解决的问题。

youdao

But, secondary data, survey by an outside marketing research firm, mining of company's internal recording, and building customer's database in the trade process are widely used methods.

建立企业营销信息系统的方式可以是二手资料收集、委托外部市场研究公司收集、整理企业内部管理档案、在与顾客交易时建立顾客数据库等。

youdao

Raw data is the information obtained when one conducts a survey or data mining exercise.

FORBES: After Google, Time To Cut Out Earnings Season?

Mining electoral data from the General Social Survey, they found that the decline in white working-class support for Democrats occurred in one period from the mid-seventies until the early nineties, with a brief lull in the early eighties and has remained well below fifty per cent ever since.

NEWYORKER: The Hardest Vote