加速度的方向与合力的方向相同。
The direction of the acceleration is the direction of the net force.
对于正旋转和离心力占优的负旋转，二次流速度的方向和静止的情况相同；
For co-rotation and counter-rotation in which the centrifugal force dominates the flow, the secondary flow in a rotating helical pipe has the same direction with that in a stationary one.
加速度的方向跟作用力的方向相同。因此以光速运动的电磁波EM，有一定动能作用于一个反射器，从而产生一个微小的力。
Thus an electromagnetic (EM) wave, travelling at the speed of light has a certain momentum which it will transfer to a reflector, resulting in a tiny force.
在太空中，计算机被用来控制宇宙飞船的速度和方向。
In space, computers have been used to control the speed and direction of a spaceship.
根据卫星信号，连同轮速传感器输入的速度和仪表所示的方向，即使在汽车移动时也能确定它的位置。
The satellite signals, along with inputs on speed from a wheel-speed sensor and direction from a meter, determine the car's position even as it moves.
此外，在最近的一项研究中，巢穴上游和巢穴入口处的水流速度，上游朝向东南和朝向其他方向的巢穴相似。
Moreover, in a recent study, current speeds upstream of the nest and at the nest entrance were similar for nests upstream facing southeast and those facing in other directions.
有些种类的蝙蝠会根据回声频率的变化来调整向猎物移动的方向和速度。
Responding to changes in the CF echo's frequency, bats of some species correct in flight for the direction and velocity of their moving prey.
司机可以利用操纵杆之类的来控制方向和速度，这样车辆可以原地旋转并加速得相当快。
Drivers use a joystick of sorts to steer and throttle the vehicle, which can spin in place and accelerates rather quickly.
这些节点可以从地面的振动测量出车辆的速度和方向。
They were able to measure the speed and direction of vehicles from ground vibrations.
尽管方向是明确的，但速度却不明确。
它们要么直接向目标开炮，要么试着根据您的速度和方向来推算位置。
Either they will fire directly at their target, or they will try to project your position based on your speed and direction.
放射性微粒形成之后，可以飘到很远的地方，具体多远就看主风的速度和方向。
Radiation-emitting particles can then travel afar, depending on the speed and direction of the prevailing wind.
一阵风包含着因频率不同而速度及方向有差的气流。
A single breath of wind contains small eddies and currents that vary in speed and direction with differentfrequencies.
11点13分——讯息显示更多的问题：监测速度、高度和方向的仪表失灵。
13 p.m. - Messages report more problems: The system that monitors speed, altitude and direction failed.
在y轴方向的速度,从+133开始，而现在是。
The velocity in the y direction started off plus 133, -133 but now it is minus 133.
卫星信号加上轮速传感器的速度输入以及仪表所示的方向，就能确定汽车的位置，即使它在开动中。
The satellite signals, along with inputs on speed from a wheel-speed sensor and direction from a meter, determine the car's position even as it moves. (CET-6, 2002.1
它可以知道其它机器人的距离、方位、方向、速度和能量等级。
It can see the distance, bearing, heading, velocity, and energy level of other robots.
它告诉我们在任何时间我们运动的速度，以及它的方向，那么，举个例子。
It tells us at any time how fast we are going, and in what direction. So, for example, observe.
既然，个体的社会环境会影响到它的生存和繁殖能力，那么进化的速度或方向会受到这些变化的影响也许就在会预料之中了。
Since an individual's social environment affects its success in terms of survival and reproduction, you might expect such changes to influence the speed or direction of evolutionary change.
我确实还得收集更多的数据，看看点击后的速度是不是恒定的，但让我先看看点击之前竖直方向的加速度吧。
Yes -i need more data to really see if the final velocity is constant. However, let me look at the distributions of vertical accelerations before the tap.
我确实还得收集更多的数据，看看点击后的速度是不是恒定的，但让我先看看点击之前竖直方向的加速度吧。
Yes - I need more data to really see if the final velocity is constant. However, let me look at the distributions of vertical accelerations before the tap.
但是，尽管未来学家对于进化的速度估算有偏差，但是预测进化方向还是大致正确的。
But even if the futurists are wrong about the pace of change, they may turn out to be right about the direction.
汤普森利用扩散方法成像，他控制水通过白质扩散的方向，显示大脑连接的速度。
Thompson used diffusion imaging, which measures the direction in which water diffuses through white matter, to show the speed of the connections.
这意味着如果我们在这点观察运动的轨迹，它的加速度是指向这个方向的。
So, what that means is that if I look at my trajectory at this point, that the acceleration vector is pointing in that direction.
物质是被动的，仅仅是以相同的速度朝着相同方向做运动而已,除非受到外力的影响。
Matter is passive, just keeps going in the same direction the same speed until its acted upon by a force.
可以远距离地传递风暴入侵的消息，以及风暴的移动速度和方向。
Vessels receive, at a considerable distance, the news of a storm approaching, together with its velocity and direction.
在银行家们看来，撇开速度不谈，大家对于旅行的方向还是认可的。
In the case of the bankers, most of us are agreed on the direction of travel, if not the speed.
不论群里有多少鸟，每只鸟的飞行的方向和速度，同其他鸟的方向和速度都是不变化的。
Regardless of size, the correlations of a bird’s orientation and velocity with the other birds’ orientation and velocity didn’t vary.
铁盘以每秒26周的速度向相反方向旋转。
The discs whirred in opposite directions some 26 times a second.
铁盘以每秒26周的速度向相反方向旋转。
The discs whirred in opposite directions some 26 times a second.
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