The Falcon Hypersonic Test Vehicle 2 (HTV-2) successfully separated from its rocket but lost contact shortly into its "glide phase".
“猎鹰”高超音速试验机(HTV -2)成功与运载火箭分离，然而进入“滑翔阶段”后不久便与地面失去了联系。
The developing tools for hypersonic vehicle, i. e. ground test, computation and flight lest all have limitations for simulating hypersonic flight.
高超声速飞行器的设计工具，即地面试验、计算和飞行试验，在模拟高超声速飞行方面都有其局限性。
The developing tools for hypersonic vehicle, i. e. ground test, computation and flight lest all have limitations for simulating hypersonic flight.
高超声速飞行器的设计工具，即地面试验、计算和飞行试验，在模拟高超声速飞行方面都有其局限性。
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