More recently,NASA abandoned hope for the X-33,a pro posed replacement for the space shuttle that was supposed to fly from the ground to orbit in a single stage,rather than using a booster rock et,because the technology never quite panned out.是什么意思_More recently,NASA abandoned hope for the X-33,a pro posed replacement for the space shuttle that was supposed to fly from the ground to orbit in a single stage,rather than using a booster rock et,because the technology never quite panned out.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句