No base class to extend, no abstract methods to implement, no controller to coordinate with — just an object with the right shape.
The abrupt shift in strategy was laid out by the space agency’s recently confirmed administrator, Jared Isaacman. Announcing the changes on Friday, he said that Nasa would introduce at least one new moon flight before attempting to put humans back on the lunar surface for the first time in more than half a century, in 2028.
。关于这个话题，safew官方下载提供了深入分析
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