Nineteen Seventy-three

Nineteen Seventy-threeNineteen Seventy-three
  1. The spillway was used only once before , in nineteen seventy-three .

    溢洪道是只使用过一次,在一九七三年。

  2. The rockets were d from service in nineteen seventy-three . But they remain the most powerful ever built .

    土星五号火箭在1973年退役,但仍然是有史以来最强大的火箭。