random extraneous variable 随机的额外变量
systematic extraneous variable 系统的额外变量
extraneous relevant variable 额外相关变量 ; 关变量
·2,447,543篇论文数据，部分数据来源于NoteExpress
stochastic variable , random variables
The price of Wheaties is not enough of a shared experience, and too variable due to all sorts of extraneous factors, to be used as a benchmark for anything.
FORBES: Oil Continues to Rise Because the Dollar Continues to Fall
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