There are three categories of geochemical exploration method deriving the deep mineral characteristics from the data, including: the normal (geochemical rock survey, geochemical soil survey);

可用于提取深部矿化信息的地球化化学 方法，有三类：常规地球化学方法：岩石测量、土壤测量；

youdao

In October, the university released other data from the survey suggesting that a majority of people were concerned about categories of migrants that it was most difficult for the government to reduce.

BBC: Immigration cuts: Londoners and Scots 'more opposed'