... EarLy space missions晚期的太空义务 Making rockets制造火箭 Going to space到太空去 ...
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火箭制造工艺学 [航] rocket manufacturing technology
制造火箭
Manufacture rockets
以上为机器翻译结果，长、整句建议使用 人工翻译 。
然后他放慢了速度，开始制造火箭。
Then he slowed down and began making a rocket.
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从他父亲那里，他得知科学家们制造火箭来把东西送入太空，而宇宙飞船是用来载人穿行太空的。
From his father, he knew that scientists make rockets to carry things into space, and spaceships are used to carry people through space.
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