例句與造句

1. Abstract : this paper introduces the principles of doppler radar signal processing method in the modulation . it provides the processing method for projectile tracer time , the burst time , rocket engine working time , projectile spin and flight attitude from signal of doppler radar
   文摘:介紹了測速雷達(dá)調(diào)制域彈道信息處理方法的工作原理，詳細(xì)論述了從測速雷達(dá)信號中處理彈丸曳光時(shí)間、底排燃燒工作時(shí)間、火箭發(fā)動(dòng)機(jī)工作時(shí)間、彈丸旋轉(zhuǎn)速度、飛行姿態(tài)角和擺動(dòng)周期等彈道信息的方法。
2. It's difficult to find projectile spin in a sentence. 用projectile spin造句挺難的