短語(yǔ)詞組短語(yǔ)at t random 隨機(jī)地;隨意地Draw at Random 任選test at random 隨機(jī)檢騐Not Missing At Random 非隨機(jī)缺失;非隨機(jī);缺失;隨機(jī)unblock at random automatically 自動(dòng)存包櫃select at random 任意挑選;隨便挑選sample taken at random 任選樣品dress at random 衣著不整missing at random MAR 隨機(jī)缺失 返回 at random