The earliest launch opportunity is now in April - but Nasa said the exact date would depend on how long the technical work would take.
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"The crew's doing great," Steve Stich, manager, Nasa's Commercial Crew Program, said at a news conference.
8年攻坚、5年过渡，中国以成功实践进一步向世界表明：本着滴水穿石、一张蓝图绘到底的韧性、恒心和奋斗精神，贫困不仅是可以战胜的，更是可以阻断、不再复发的。