@SpaceX 16 story tall rocket, traveling several times faster than a bullet, backflips & fires engines to return to launch site
@SpaceX 16层楼高的火箭，飞行速度比子弹快几倍；发射引擎返回发射场
@SpaceX 16 story tall rocket, traveling several times faster than a bullet, backflips & fires engines to return to launch site
@SpaceX 16层楼高的火箭，飞行速度比子弹快几倍；发射引擎返回发射场