After the first stage burns out it falls back to earth along a parabolicpath while the engines of the second stage fire to thrust the rocket into an earth orbit.
当第一级烧毁后,沿抛物线的轨道落到地球,而第二级的发动机点火把火箭发射到地球轨道。
2
Finally it provides the application program and the parabolic curve of the discharging path line of the particle.