巨大的步伐
technology fusion of surface to air missile and ballistic missile is spurring to form development in giant stride for two types missiles
地空导弹与弹道导弹的技术融合正在促使这两类导弹产生突破性的发展
He took a giant stride forward in understanding mechanical principles and in understanding gravity.
他在认识力学原理和重力方面,迈进了一大步.
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