1."Flying Leopard" fighter is designed, self development, self-production of multi-purpose, all-weather, supersonic fighter-bomber.
“飞豹”战机是中国自行设计、自行研制、自行生产的多用途、全天候、超音速歼击轰炸机。
2.They are, however, far more cost effective than supersonic fighter jets.
然而大雄蜂无人机比超音速战斗机更有成本效率。