解释flight over

解释flight over flight over the north pole his flight over the north pole three years after his flight over the North Pole after 用法three years after his flight over the North Pole.此句中 three years after his flight over the North Pole这句话我怎么越看越别扭啊 it is over 3 h_____ flight from our city to beijing In 1929,three years after his flight over the North Pole.the In 1929,three years after his flight over the North Pole,the 英语翻译In 1929,three years after his flight over the north pole In 1929,three years after his flight over the North Pole,. in 1929 three years after his flight over the north pole 请问