n.有返回抽樣方案 sampling scheme: 抽樣方案composite sampling scheme: 復(fù)合抽樣方案key sampling scheme: 關(guān)鍵碼取樣方案multistage sampling scheme: 多級攝影取樣圖sampling inspection scheme: 抽樣檢驗(yàn)方案下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯