He added that the extra flight to low-Earth orbit would help to test the technology before a Moon landing.
Любовь Ширижик (Старший редактор отдела «Силовые структуры»)。业内人士推荐快连下载安装作为进阶阅读
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Astronaut Jim Lovell, who guided the Apollo 13 mission safely back to Earth in 1970, has died aged 97.