我们怎样计算，重心速度呢？
这就是重心速度。
使v2为，你显然知道,在这里有同样的结果，它必然是重心速度。
Make v2 zero, and you see exactly that you see here the same result, so this must be the velocity of the center of mass.
你若想要移动，在重心体系中，你就必须知道，重心速度是多少。
If you ever want to move yourself to the center of mass, you will have to know what the center-of-mass velocity is.
运动员蹬冰时蹬冰腿的髋、膝关节角速度与运动员的重心速度有着直接的联系。
The Angle velocity of hip joint and knee joint of the leg which is committing the stroke has obvious relationship with the speed of mass center of the body.
在过渡阶段，我省运动员身体重心速度和铅球速度都有较大的下降而且过渡阶段时间明显偏长。
At the transitional stage, the speed of body barycenter and the shot descend too much, and the transitional time is obviously too long.
少年女子跳远二级运动员起跳离板瞬间，重心速度比高水平运动员慢得多。起跳腿的膝角和髋角也小于高水平选手。
Young female long jump two levels of athletes take off to the board instantaneous, the center of gravity speed scaled height of burst horizontal athlete is much slower.
运用生物力学的研究方法对我国优秀男子跳远运动员的起跳过程进行研究，得出我国优秀男子跳远运动员在起跳过程中身体重心的运动轨迹、重心速度、位移等运动变化情况，研究了摆动腿的运动特征。
Through biomechanical analysis of top Chinese long jumper's take off, we learned that the moving track, speed, displacement of body's center of gravity and kinematics character of leg in the take off.
我们想知道，质量重心的速度是多少，对于另一个。
We want to know what the velocity is of the center of mass of the other one.
如果飞机飞的太快的话，升力的重心就会从机翼转移到前半部机身上，飞机就会下降，速度会接近音速。
If you go much faster, the center of lift moves back on the wing, pushing the nose down and increasing velocity, until you soon approach the speed of sound.
质量重心的速度，并没有发生改变，你在参照系中可以看出，因为质量重心的速度，总是保持不变，要记住，由于动量守恒。
The velocity of the center of mass has not changed as seen from your frame of reference, because the velocity of center of mass is always the same, remember, because momentum is conserved.
在没有外力，作用于整个系统时-，我们上次讨论过-，重心总是，有相同稳定的速度。
In the absence of any net external forces - on a system as a whole — - as we discussed last time — the center of mass will always have the same velocity.
顺便提一下-，这并不明显-，它也是质量重心的速度。
This, by the way — - it's not so obvious — is also the velocity of the center of mass.
我们做过演示的，弹簧连接两个振动物体，但是质量重心，却保持稳定速度。
We did a demonstration there with two vibrating objects with a spring, but yet the center of mass was moving with a constant velocity.
要进入重心体系，你就必须减去速度，重心的速度，从原始速度中减去。
So to get into the center-of-mass frame, you must subtract the velocity of the center of mass from the initial velocities.
将物理重量桥接到虚拟对象上是通过物理控制器的重心来确定游戏中的速度的。
The way you bridge the physical weight to the virtual is to use the center of mass of the physical controller to determine in-game velocity.
因此，单纯从获得速度改变量大小的角度来推断蹬冰加速的机制，并不是重心沿前进方向加速的唯一条件。
Therefore, the mechanism that the accelerating theory of pushing depends on speed change is not the sole condition of the weight's acceleration forward.
跳远成绩主要取决于起跳离地瞬间人体重心腾起的初速度和腾起角度。
Long jumping performance depends mostly on the initial speed and Angle of projection of body gravity.
TE的六条腿以每小时最高60公里的速度移动这台低重心机器。
The six legs of the AT-TE move the low-built vehicle at speeds of up to 60 kilometers per hour.
能有效地运用跳板和横马使重心达到和维持完成跳马所需要的速度，并且在第二次腾空需要的0.08秒内充分地完成复杂的腾空旋转动作。
They can use the board and side horse effectively, make center of gravity, reach and maintain speed needed in the vaulting, and complete the flight movement in 0.08 seconds.
因为当你在将腿伸出到前方时，从你身体重心要赶上双脚所花费的时间来看，你其实是在减慢速度。
Because when you stick your leg out in front of you, you actually decelerate, from the time it takes the center of mass of your body to get over your foot.
对于任意一个重心位置，平衡速度由它的初始值变化到较大的值时要求升降舵向下偏转。
For any C. G. position, an increase in trim speed from any initial value to a larger one requires a downward deflection of the elevator.
重心位置关系到摩托车的行驶速度、稳定性及整车的性能指标和使用寿命。
The location of motorcycle's centre of gravity affects the life of a motorcycle and many of its performance specifications, such as driving speed, stability, etc.
运用土地转移矩阵、重心转移、扩展速度、景观指数计算等方法。
Other methods were used as land transfer matrix, expansion rate and landscape index.
他重心很低，速度很快，盘带很好。
He has a low centre of gravity, great pace and tricky dribble.
德约科维奇的整个动作，球拍的速度、身体的转动和他腿部的重心转移产生了如此大的动力。
There's so much momentum created by his racquet acceleration, trunk rotation, and the weight shift in his legs that Djokovic is off the court when he follows through.
结果显示：（1）背越式跳高最大的优越性是弧线助跑起跳能经济实效的降低和升高身体重心，为身体重心运动方向的提早转变和垂直速度的提早积累、增大创造有利条件。
The result is :(1) the most superiority of flop is the approach can change the gravity of body, so that accumulate favorable circumstances for the transform timely of body-gravity.
通过摇摆率和横向加速度传感器，使车辆围绕其重心旋转的力量就会被记录下来。
Via the yaw rate and lateral acceleration sensor (B24/15) forces are recorded which want to rotate the vehicle about the center of gravity.
通过摇摆率和横向加速度传感器，使车辆围绕其重心旋转的力量就会被记录下来。
Via the yaw rate and lateral acceleration sensor (B24/15) forces are recorded which want to rotate the vehicle about the center of gravity.
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