抛物线的焦点位于抛物线轮廓外部。
The focus of the parabolic profile is located outside of the profile.
注意：射出去的箭是有抛物线的，要掌握好时机再射。
Note: to shoot the arrow is a parabola, we must grasp the opportunity of re-launching.
我们可以画出这样的开口向下的抛物线。
这是个抛物线,它完全是对称的
也不是沿一条抛物线轨迹，因为小球是竖直射出的。
It wasn't going into a parabola because I was shooting it straight up.
所以，试着看，网球是一个，比较理想的抛物线。
So, try to see that the tennis ball is very close to an ideal parabola.
人类已经研究了抛物线近千年，对它的性质理解的很透彻。
Parabolas have been studied for millennia, and their properties are well understood.
这部分是条抛物线，抛物线这边是水平的。
And this part is a parabola and this parabola here is horizontal.
运行到抛物线形的趋势线右边是该趋势结束的信号。
A move to the right of the parabolic trend line is an exit signal.
在这类小说中存在着共同的潜在模式，即抛物线结构。
In these novels, there exist common potential modes like parabola structure.
抛物线侦测在道路辨识应用中是个十分重要的议题。
Parabola detection is a fundamental problem in road recognition application.
本文介绍其中的抛物线法。
在这样一条条抛物线后面，是一系列扎扎实实的保障工作。
In such a rear of the parabola, is a series of solid security work.
在这样一条条抛物线后面，是一系列扎扎实实的保障工作。
In such a rear of the parabola, is a series of solid security work.
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