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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.
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不只是红色文化，中华优秀传统文化同样深受入境游客喜爱。
2012年12月，党的十八大闭幕不久，习近平总书记来到地处太行山深处的河北阜平县，进村入户看真贫。
Canva is a great tool for people who want to create professional graphics but don’t have graphic design skills.