It's blamed COVID, changes to it's flagship rocket's design, changes to it's engine and materials.

将其归咎于疫情、旗舰火箭设计的改变、发动机和材料的改变。

If all goes well, the three-stage rocket designed by the Korea Aerospace Research Institute will carry a dummy satellite into space on Thursday.

如果一切顺利，韩国航空宇宙研究院设计的3级火箭将于周四搭载模拟卫星进入太空。