rndal, C., Swensson,B., and Wretman J. (1992), Model Assisted Survey Sampling, New York: Springer-Verlag.是什么意思_rndal, C., Swensson,B., and Wretman J. (1992), Model Assisted Survey Sampling, New York: Springer-Verlag.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句