常見例句雙語例句Methods:The stratified sampling and cluster random sampling methods are used in this survey.方法：本研究採用分層隨機(jī)抽樣方法和整群隨機(jī)抽樣方法。The survey was completed on the basis of combining stratified sampling and random sampling, collecting 1005 valid samples in total.調(diào)查在分層逐級抽樣法與隨機(jī)抽樣法相結(jié)郃的抽樣基礎(chǔ)完成，共收集有傚樣本1005個。Considering the methods employed on site and the implement used for drawing the samples, normally quantity interval, time interval or stratified sampling method shall be used.應(yīng)根據(jù)現(xiàn)場作業(yè)方式、取樣設(shè)施配備情況選定，一般採用定量取樣、定時取樣或分層取樣等方式。vernon0426.blog.163.com 返回 stratified sampling