Collins had to pilot the shuttle through a 360 degree flip while flying beneath the International Space Station. It allowed colleagues on the orbiting lab to photograph the craft's underside and check if the heatshield had been breached.
Андрей Ставицкий (Редактор отдела «Наука и техника»)，详情可参考51吃瓜
20 monthly gift articles to share。关于这个话题，夫子提供了深入分析
Трамп высказался о непростом решении по Ирану09:14