Su-11

例句：

1. 1. The Su-11 fighter jets are the backbone of our military.
   苏-11战斗机是我们军队的骨干。
2. 2. The Su-11 is a fast and powerful aircraft.
   苏-11是一种快速且强大的飞机。
3. 3. The Su-11 was developed to replace the aging Su-27 fleet.
   苏-11是为了取代老化的苏-27舰队而研发的。