trajectory peak

例句：

1. 1. The trajectory of the spacecraft isdetermined by its speed and direction.
   宇宙飞船的轨迹由其速度和方向决定。
2. 2.The trajectory of the project will be affectedby various factors.
   该项目的轨迹将受到各种因素的影响。
3. 3. The trajectory of the ball wasstraight and unbroken.
   球的轨迹是直的，没有中断。