1·Neither technique is complicated or new, but the combination of images and ballistics had never been used for launch analyses before.
这一技术并非什么新颖复杂的技术，但是把成像技术和弹道学综合运用在以前的发射分析中是不曾有过的。
2·The paper introduces a new theory and method to investigate the stability in the exterior ballistics.
该文提出了外弹道学中研究动态稳定性问题的一种新理论和新方法。
3·The method is concise and convenient for program, simulation and computation. It can be applied in many study fields, such as rocket launch dynamics, external ballistics, firing table.
该方法简洁方便，易于编制程序及模拟仿真，便于工程人员掌握，可用于火箭发射动力学、外弹道学及射表编制等方面研究，具有一定应用价值。
4·It's an entertaining read, and you'll also learn a bit about things like ballistics, DNA, the oceans, and the atmosphere.
这本书能给你带来愉悦，同时你还能学到些东西，比如说，弹道学，DNA，海洋，以及大气层等。
5·Ballistics: Science of propulsion, flight, and impact of projectiles.
弹道学：研究射弹的动力、飞行和弹著作用的科学。