形成龙卷风，寒冷的空气必须处在暖湿的空气上部，而风应该在不同高度向不同的方向运动，以此创造出剪切力。
To form a tornado, cold air must sit above warm and moist air, and the wind needs to go in different directions at different heights, creating shear forces.
大气扰动以热成风的方向运动过程。
The movement of an atmospheric disturbance in the direction of the nearest thermal wind.
因为一旦事物开始改变，他们就会有朝这个方向运动的倾向。
Because once things started moving, it tends to move in that direction.
两辆被弹簧绑着的车，我使它们运动，它们向这个方向运动。
This is... these are two cars connected by a spring, and I will give these cars a certain motion and they will go in this direction.
肌腱和肌肉也提供骨头向相对的方向运动的力量。
The tendons and muscles alsoprovide a force to move the bones relative to each other.
肌腱和肌肉也提供骨头向相对的方向运动的力量。
The tendons and muscles also provide a force to move the bones relative to each other.
高速的冲击波和压力脉冲波在水中向各个方向运动发散。
A high velocity shock wave or pressure pulse travels out through the water in all directions from the explosion.
当建立起一个电场时，全部自由电子都会朝一个方向运动。
When an electric field is set up, all the free electrons will be made to move in one direction.
对置式的发动机的每隔气缸中都有两个活塞沿相反方向运动。
An opposed-piston engine has cylinders in each of which two pistons travel in opposite directions.
通道内有许多不均一的障碍物，引导细胞朝某个首选方向运动。
The asymmetric obstacles inside these channels direct cell movement along a preferred direction.
螺旋度是表征流体边旋转边沿旋转方向运动的动力性质的物理量。
Helicity depicts dynamic feature of fluid that is rotating while moving along the rotating direction.
如果你试图把它想象为，在随机方向运动的分子，你就会发现这也完全讲得通。
And, if you try to think about it as molecules moving in random directions, you will see it makes actually complete sense.
有的说某一天宇宙将会停止膨胀并向其相反的方向运动——逐渐缩小。
Some say it will stop expanding some day and will begin to move in the opposite direction, to grow smaller.
许多自由派分子开始朝着这位出类拔萃的操纵者认为不可想象的方向运动。
Many liberals began to move in a direction that the master manipulator had considered inconceivable.
拉丁舞里的破步是由两步组成的步伐，第一步和第二步是以相反方向运动的。
The Latin break step is a two step sequence where the first and second steps are taken in opposition.
也就是说，如果朝该方向运动，函数值变动得最剧烈，那么相应的斜率就是梯度向量的模长。
OK, so if I go in that direction, which gives me the fastest increase, then the corresponding slope will be the length of the gradient.
当导体的自由电子只以一个方向运动时，这样产生的电流叫做直流电，常缩写为。
When the free electrons in a conductor move in one direction only. The current thus established is called a direct current, which is often abbreviated to DC.
现在它这样动，我将重新做这个，实验，改变它转动的方向，它就会反方向运动了。
Now it's going this way and I'm going to redo the experiment, changing the direction of rotation, and then it will go the other way around.
帘布被绷紧在两个卷轴之间，卷轴能使长条形狭缝以不同的速度沿卷片方向运动。
The curtain is tensioned between two rollers which pull the slit across the film at various speeds.
压缩的岩石也会向水平方向运动，进入到不如自身密集的，临近的土壤中或者空间里。
Compressed rock can also drive horizontally, into nearby soil or space not occupied by anything as dense as itself.
还有方向，所以如果，你把粒子放在这下面，电场的方向相反，粒子会朝另一个方向运动。
So, if instead you put your particle somewhere down here on the electric field, or on the wave, the electric field will now be in the other direction so your particle will be pushed the other way.
然而，如果在诞生之时宇宙就绕轴朝着一个方向运动，那么星系就应该保留了这样的旋转。
However, if at birth the universe revolved around its axis in one direction, then the galaxies would have retained the rotation.
在等离子体中，鞘层在控制带电粒子向极板(或靶材)方向运动方面起着至关重要的作用。
In plasma, the sheath plays a crucial role in controlling the movement of the charged particles towards the electrodes (or the target).
在共轭爆轰模型中，阵面激发化学反应释放出的能量，使得爆轰产物粒子朝不同的方向运动。
In conjugate detonation model, chemical reaction is initiated by the shock wave front, and the released energy makes the particles of explosion products move in different directions.
我说“比较”，是因为当带电粒子沿著逐渐汇聚的磁力线方向运动时，会感受到一股迟滞力。
I say "relatively" Because charged particles will experience a retarding force if they travel along magnetic field lines that converge.
在英语中这个词的意思是一个运动中的物体会想要保持在原来方向运动，直到有原因改变这样。
In plainer English that means that an object in motion will tend to want to continue in motion along the same direction until it has a reason not to.
岩浆会朝着阻力最小的方向运动，也就是向北，因此会冲向现在加勒比或是中美洲的所有火山下方。
It will move in the direction of least resistance, which will be toward the north, and thus it will rush under all volcanoes currently in the Caribbean or in Central America.
哈耶克(1978年的采访)：就所关心的思想观点运动来说，现在是我生命中第一次朝正确的方向运动。
FRIEDRICH VON HAYEK (interviewed in 1978) : As for the movement of intellectual opinion is concerned, it is now for the first time in my life moving in the right direction.
哈耶克(1978年的采访)：就所关心的思想观点运动来说，现在是我生命中第一次朝正确的方向运动。
FRIEDRICH VON HAYEK (interviewed in 1978) : As for the movement of intellectual opinion is concerned, it is now for the first time in my life moving in the right direction.
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