They are the radius of the orbit, the energy of the system and the velocity of the electron, and I am just going to present you the solutions.
它们是轨道的半径，系统的能量以及电子的速度，我接下来给你们展示解法。
This deficiency can be dealt with using the Velocity Verlet algorithm.
这个缺陷可以用维尔莱速度算法处理。
Well, the velocity is minus six.
速度是。
OK, so that's the velocity vector.
好，这就是速度矢量。
I don't know what the velocity is.
不知道速度。
Clearly, here the velocity is zero.
显然，这里的速度就是。
All right, what is the velocity here?
那么这里的速度是什么呢？
What is the velocity of this particle?
那么粒子的速度又是多少？
这是它的速度。
速度是什么呢？
And so, that's called the velocity vector.
因此我们叫它速度矢量。
If I push softly, the velocity will be low.
我若轻轻推，速度就比较小。
It's the magnitude squared of the velocity.
这是速度大小，的平方。
OK, that's what we call the velocity vector.
就是我们所说的速度矢量。
Out of that pops the velocity, as we discussed.
除此之外是速度，如我们讨论过的那样。
What now is the velocity at any moment in time?
那么任意，时刻的速度是多少？
This is my time axis, and this is the velocity.
这是时间轴，这是速度。
If I push hard, then the velocity will be high.
我若使劲推，速度则比较大。
So the velocity is changing in a linear fashion.
因此速度，呈线性变化。
Now, here you see the equation for the velocity.
你看到关于，速度的等式。
Notice that the velocity changes here throughout time.
请注意，速度也一直，随着时间的改变而改变。
This is the velocity that is predicted by the one story.
这就是一个故事的预期速度。
Then she painstakingly measured the velocity of each star.
然后她特别测量了这些星体的速度。
How do we calculate the velocity of the center of mass?
我们怎样计算，重心速度呢？
Creating templates with the Velocity template language.
使用Velocity模板语言创建模板。
So during the second second, the velocity is not changing.
因此在第二秒内，速度没变。
The speed is not changing, but the velocity vector is changing.
速率保持不变，但速度矢量会发生变化。
So, the velocity vector is going to be always tangent to the curve.
速度向量总是与曲线相切的。
Here, the velocity is almost constant — it's almost a straight line.
而在这里速度几乎是个常数了-，在这里接近一条直线了。
The velocity of the Earth in orbit is about 30 kilometers per second.
地球在轨道里的速度，约为30千米每秒。
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