The third is the change in industry struc-ture from a pyramid to an hourglass shape as the really big schools become ever big-ger, squeezing the schools in the middle segment.是什么意思_The third is the change in industry struc-ture from a pyramid to an hourglass shape as the really big schools become ever big-ger, squeezing the schools in the middle segment.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句