The only two flights since then have been test s of safe ty improvement s to the fuel tank, but carr ied no major part s for the research outpost .

 
  • 此后仅有的两次飞行也只是对燃料箱的安全性改进做了测试,并没有向研究前哨(空间站)运送任何主要部件。
今日热词
目录 附录 查词历史