Question

新概念英语2册43课第一句话.In 1929,three years after his flight over the

Answer 1

这句话你这么理解 ,在1929年,即他飞越北极的三年之后,这个美国探险家首次成功地飞越了南极.

In 1929,the American explorer,R.E.Byrd,successfully flew over the South Pole for the first time.这是句子的主干,所以应该是首次成功地穿越.

three years after his flight over the North Pole 可以理解为1929 年的同位语 ,也就是他成功飞越北极的 三年之后,after his flight over the North Pole介词短语修饰three years.eg

five years after graduation 意思是毕业五年之后