"If Yuri Gagarin had not made this flight I would not have flown to the moon," said US astronaut Thomas Stafford, commander on the first US lunar landing in 1969.
1969年美国登月计划指挥官、美国宇航员托马斯 斯塔福德说：“如果尤里 加加林没有进行首次太空飞行，我可能也没有飞去过月球。”
If the thin cloud hadn't flown away, I would have never got to know what the sound was like.
如果薄云未曾飘走，我可能永远不会知道那是什么声音。
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