linear parabolic equation

例句：

1. 1.The line of the road is straight as an arrow.
   这条道路线直如箭。
2. 2.The data is linearly proportional to the input.
   数据与输入成正比例关系。
3. 3.The graph shows a linear relationship between the two variables.
   这个图显示了两个变量之间的线性关系。
4. 1. The parabolic shape of the mountain is breathtaking.
   这座山的抛物线形状令人叹为观止。
5. 2. The physicist used a parabolic equation to describe the motion of the planets.
   物理学家用一个抛物方程来描述行星的运动。
6. 3. The parabolic path of the ball is always in the center of the court.
   球的抛物路径总是在球场的中心。