{
	"originalText": "许多可重复使用运载火箭项目致力于研发垂直降落的第一级或回收主发动机,但澳大利亚的“南半球运载火箭”项目正在对一种降低发射成本的不同方案进行飞行试验?该方案采用的是可飞回的带翼助推器和由超燃冲压发动机驱动的可重复使用第二级?",
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