标题: 重复性同位语结构是什么啊？？ [打印本页] 作者: 刘小谁 时间: 2012-3-2 10:46 标题: 重复性同位语结构是什么啊？？ Since the 1930's aircraft manufacturers have tried to build airplanes with frictionless wings, wings so smooth an so perfectly that air passing over them would not become turbulent.