它与两侧的加数移位的可约性有关.It has to do with the reducibility of two - sided weighted shifts.50年代中这两方面的雇员增加数占总数的27%.Twenty - seven percent of the net employment gain during the 1980 s was in those two categories.两个数相加, 交换加数的位置,他们的和...
...a grizzled old age pensioner...头发花白、靠养老金过活的老人He is already an old man and pensioner, but quite active.他已经是个老年人,领养老金了, 但是精力相当充沛.The tax threshold for a pensioner is $ 6,000.领退休金的人的纳税起点是六千美元.The delighted pensioner walk...