extraneous variable

基本解釋

Again, no extraneous or random variables can enter into the equation.
再次申明，外部的和隨機的變數(shù)不能干擾這個過程。
More bias likely from extraneous variables, due to greater difficulty of controlling all aspects of experiment outside the laboratory.
可能會有來自額外變量的更多的偏差，因為在實驗室外控制實驗的所有方面有很大困難。
Wary of these possible criticisms, Rule and Ambady conducted a second experiment that controlled for such extraneous variables as self-presentation and hairstyle.
處于對這些批評的謹(jǐn)慎， Rule 和 Ambady實施了第二次實驗以控制外部變量，例如自我表現(xiàn)和發(fā)型。