一篇关于火箭写一篇英语作文

The subject of rocket propulsion is treated with emphasis on the basic technology,performance,and design rationale.Attention is given to definitions and fundamentals,nozzle theory and thermodynamic relations,heat transfer,flight performance,chemical rocket propellant performance analysis,and liquid propellant rocket engine fundamentals.The discussion also covers solid propellant rocket fundamentals,hybrid propellant rockets,thrust vector control,selection of rocket propulsion systems,electric propulsion,and rocket testing.