Drag is the force of air resistance pushing against a ball's motion and slowing it down, while lift is a force causing a ball to swerve off a straight path.
拉力是一种物体在空气中所受到的阻力，它能产生与球运行方向相反的作用力，减缓球的运行速度，而升力则是一种能使物体偏离直线运行轨迹的力。
If you kick the ball hard enough for the airflow over the surface to become turbulent, then the drag force remains small and the ball will really fly.
如果你踢球的力量足够大，使得球表面的气流形成湍流，则阻力会很小，你很可能踢成高射炮。
If there were no drag force at all, I hope you realize that the velocity would increase linearly, so you would get something like this.
我希望你们了解，速度将直线上升，你们将得到这个，无阻力的情况下。
Once the ice is dislodged, gravity or air-drag force such as on an airplane wing do the rest.
一旦接合部分被融化了，剩下的事情就可以交由重力或空气摩擦力(如在飞机的机翼上的空气摩擦力)来完成。
The forces on a spinning ball that is flying through the air are generally divided into two types: a lift force and a drag force.
空气中运行的旋转球的受力通常分为两种：升力和阻力。
This drag force depends on the shape of the object, the size of the object, the medium through which you move it and the speed of the object.
阻力取决于物体的,形状，大小,通过的介质,以及通过的速度。
These show that vegetation dam can reduce starting drag force and starting frequency of sediment in upper reaches. And can make athletic sediment deposit.
说明植物坝可以减小泥沙的起动拖曳力，降低上游泥沙的起动频率，并能使运动的泥沙在坝上游沉积下来。
The combination of low pressure on one side and high pressure on the other creates a drag force that must be overcome — a significant waste of energy.
为此，必须浪费大量能源以克服压力差产生的拉力。
Based on the double factors linearization concept proposed by authors, the drag force acting on inclined cylinder in wave-current field has been linearized.
根据作者提出的双参数线性化概念，对波流共同作用下倾斜杆件上的波浪拖曳力作了等效线性化。
However, ComVentures' ownership percentage, plus certain rights they have (called "drag along rights"), can force the other investors and the company founders to sell.
然而，由于ComVentures的股份比例，外加他们拥有的某些权力(被称为“dragalongrights”——拉着别人一起)，让他们能迫使其他投资人和公司创始人不得不出售公司。
By taking cluster effects into account, it USES the energy-minimization multi-scale model to improve the drag force between gas and solid.
采用欧拉双流体模型，运用计及颗粒团聚效应的能量最小多尺度模型改进气固相间曳力。
The results show that the stronger the particle-particle collisional dissipation and gas-solid drag force, the more heterogeneous the flow structure.
计算结果表明颗粒间非弹性碰撞和气固间曳力的增大均使气固两相流动的非均匀性增大。
It can get the drag force according to flow energy, energy loss, energy transfer and its balance.
由坡面流能量、能量损失、传递及其平衡得出了坡面流对坡面上土物的拖曳力。
The Advanced Multiband Communication antenna System (AMCAS), developed for the U. S. air Force, is an extremely low-profile antenna that significantly reduces drag on an aircraft.
美国空军研发的先进多波段通信天线系统(amcas)是一种极低姿态天线，大大降低了飞机拖曳。
Based on the test results and movement equation established, the relationship between drag coefficient and tubular shape is obtained and the drag force imposed on pipe is calculated.
根据试验结果和建立的运动方程，获得阻力系数与圆管形状的关系，并计算了圆管所受到的拖曳力。
However, the effect of electromagnetic force is stronger than that of the plasma drag force in helium arc.
在氩弧下，影响熔池形貌的另一个重要的驱动力是气体剪切力，而氦弧下则是电磁力。
The drag force is obtained by calculation of the momentum deficit in the wall boundary layer.
拖曳力，得到了计算的势头赤字在墙上的边界层。
Through incipient motion drag force, it obtains the occurring conditions of scouring.
从土壤的冲刷起动拖曳力入手，得出了发生坡面冲刷的条件。
The active drag and hydrodynamic force coefficient were measured for athletes swimming both freestyle and breaststroke.
应用设计的装置实测了一些运动员在自由泳和蛙泳时的动态阻力和阻力系数。
The control effect of electromagnetic force on cylinder wake, lift force and drag force , which was caused by alternating current, is related to its frequency.
而交流电所产生的电磁力对于绕流涡街、升力、阻力的控制作用，则与所使用的频率有关。
The study shows that the total drags acting on a hollow block are affected by the porosity in the same flow condition , that is, the bigger the porosity is, the smaller the drag force is.
实验研究表明，对于不同的空心块体，在相同的水流条件下，受到的水平拖曳力随块体的空心率影响较大，呈现空心率越大，水流拖曳力越小的变化规律。
The working principle of the plant and the relation between the aerodynamic force and the drag of water lifting are discussed.
文中分析了该装置的工作原理，气动力与提水阻力的关系；
The interphase forces on the propagation were investigated, including wall shear stress, virtual mass force and drag force.
着重分析了相间作用力，包括壁面剪切应力、虚拟质量力、拖拽力，对压力波传播速度和衰减的影响。
Most of the natural river flows are non-uniform, but the start and the starting velocity drag force formula for formulas are based on uniform flow up.
天然河流大多属于非均匀流，但起动拖曳力公式和起动流速公式都是在均匀流的基础上建立起来的。
Atmospheric drag is the main perturbation force on a low earth orbit satellite and is closely related to the variation of high atmospheric density.
大气阻力是低轨卫星主要的摄动力，与高层大气密度的变化密切相关。
With the increase of flow velocity and drag coefficient, the damping force increases.
测试得到随水流速度增加，阻力系数增大，系缆所受阻尼力也增大。
The motion equations of a bubble near a plane wall have been established with the lift force and wall effects on the drag force taken into consideration.
在全面考虑壁面对空泡运动粘性阻力和升力影响的基础上，建立了空泡在近壁区内的运动微分控制方程。
The motion equations of a bubble near a plane wall have been established with the lift force and wall effects on the drag force taken into consideration.
在全面考虑壁面对空泡运动粘性阻力和升力影响的基础上，建立了空泡在近壁区内的运动微分控制方程。
应用推荐