manned spaceflight造句
-ToestablishChina'sownmannedspaceflightsystemandcarryoutmannedspaceflightscientificresearchandtechnologicalexperimentsonacertainscale;andChinahasselected2femalepreparatoryastronautsforthefirsttimesin...
-ToestablishChina'sownmannedspaceflightsystemandcarryoutmannedspaceflightscientificresearchandtechnologicalexperimentsonacertainscale;andChinahasselected2femalepreparatoryastronautsforthefirsttimesin...