NASA needs good weather to launch Ares I-X because engineers need to see the rocket flight all the way through first stage separation, which will mark the end of the test.
NASA需要好天气来发射战神I-X，因为工程师们要在第一级火箭分离前观测火箭飞行全过程，第一级火箭分离标志着试飞的结束。
The 1-x will climb about 40km (25 miles) into the sky during the powered phase of its flight, continuously measuring vehicle aerodynamics, controls and performance of the rocket's first stage.
战神一号X型将上升到约40公里(约25英里)的高空，在其动力飞行阶段，将不间断地对其运载空气动力学指标、火箭的第一阶段的控制和表现进行测量。
The first stage of our journey to Xi 'an will be the flight from Dalian to Beijing.
我们去西安的第一段路程将乘飞机从大连到北京。
SpaceX will attempt the recovery of morefirst stages after the CRS-3 flight, with Musk indicating that SpaceX's goal is"to recover the first stage on all CRS flights and really on most flights."
SpaceX将在CRS -3的飞行后尝试更多的第一级回收， 同时穆斯克表示，SpaceX的目标是“在所有的CRS飞行上和事实上的大多数飞行上回收第一级。
Because the missile does not have establishing or controlling surfaces, it completely relies on the swinging nozzles of its first stage engine to maintain its course of flight.
因为导弹没有稳定或控制翼面，它完全地依靠在第一级发动机的摆动喷嘴去维持它的飞行航线。
Because the missile does not have establishing or controlling surfaces, it completely relies on the swinging nozzles of its first stage engine to maintain its course of flight.
因为导弹没有稳定或控制翼面，它完全地依靠在第一级发动机的摆动喷嘴去维持它的飞行航线。
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