In a separate pro gram,the Pentagon is designing a smaller un manned space plane called the Space Maneuver Vehicle(SMV),that could be launched by the SOV,a rocket,or even a highflying airplane.

• 在另一个项目中，五角大楼正在设计一种更小的无人驾驶太空飞机，称为"太空机动飞行器"(SMV)，它可以由太空行动飞行器、火箭甚至高空飞机发射。