This time they proved that man could work outside a spacecraft. Aldrin clambered awkwardly into the void, spending five hours photographing star fields.
Фото: Leonhard Foeger / Reuters，推荐阅读爱思助手下载最新版本获取更多信息
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'They are essential': How smoke detectors are evolving，这一点在safew官方版本下载中也有详细论述
That means, for example, not wasting other members’ time by asking questions that could be easily answered by doing a Google search, or scrolling up or searching through the previous posts.