The sack is too heavy to lift—you'll have to drag it.

这麻袋太重了，提不起来。你得拖着走。

The aerofoil of a wing creates more lift than drag, but exactly how much depends on its design and the speed of the air passing over it.

飞机上的机翼制造升力超过阻力，但具体取决于机翼的设计和当时经过的空气流动速率。

But it was a birdlike tail that really amped up the aerodynamics, dampening the drag from the body and wings, as well as boosting the lift that lags under vehicle weight and cargo load.

的确鸟儿尾巴一样的飞机尾部改善了空气动力学性能，缓解了机体和机翼的阻力，同时还大大的增加了向上的力，缓释了由于飞机本身和货物重量而产生的向下的力。

In aerodynamic terms, lift is a function of weight, thrust and drag (air resistance).

在空气动力学上，升力是重量，推力和阻力(空气阻力)的相关的函数。

At altitude, the air pressure is lower, and so are aerodynamic effects such as drag and lift, ultimately causing balls to travel faster and straighter than they would at lower altitude.

由于地处高海拔地区，气压较低，因而作用在球上的阻力及升力所产生的空气动力效应也会发生相应反应，最终导致球在空中飞行速度比在低海拔地区快，飞行的路线也更直。

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。

The modern airplane design works well, but from a fuel efficiency standpoint, could planes be designed more aerodynamically — to lower drag and increase lift?

现代的飞机设计做得很好，但立足于燃料效率来看，飞机是否能设计得更符合空气动力学——降低阻力还是增加动力？

When the shape of a wing creates more lift from the air passing around it than it does drag (air resistance), an aircraft will fly.

当鱼鳍的形状通过流动的空气产生比其(空气)阻力更多的升力时，飞行物便能飞翔。

A modern sports glider, with long, slender wings, is the most aerodynamically efficient aircraft, with a lift-to-drag ratio of around 50:1.

现代运动用滑翔机的机翼长而细薄，拥有最佳的空气动力学效率，其升阻比达到50：1。

This adds to the lift and allows for longer, skinnier wings and a smaller tail, reducing drag.

这将增加飞机的升力，并且因此能够允许更长、更薄的机翼，以及更小的尾翼，从而还可以减小阻力。

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。

Then they popped the fish into a wind tunnel to calculate their lift-to-drag ratios, sometimes called the glide ratio.

之后，将其放入风洞以计算升阻比，有时也被称为滑翔比。

The design is intended to provide more lift with less drag compared with the cylindrical fuselage of a traditional aircraft, reducing fuel consumption while cruising.

设计是为了提供更多的电梯较少阻力相比圆柱形机身传统的飞机，降低燃料消耗，而游弋。

A light aircraft typically has a lift-to-drag ratio of around 10:1; for a hang-glider, the ratio is about 15:1.

一架轻型飞机通常拥有10：1的升阻比；而对于悬挂式滑翔机来说，这个比例大概是15：1。

Female fat tends to be disproportionately distributed in the lower half of the body, giving a bit more lift to the legs which in turn reduces body drag.

女性的脂肪在身体的分别并不平均，在身体的下半部分更多一些，这使得她们的腿浮得更高，减少了身体的拖动。

When the experiment was repeated with a tank full of water in the bottom, the fishes’ lift-to-drag ratio rose from 4.4 to 5.5.

当风洞底部注满水，再重复实验时，飞鱼的升阻比从4.4提高为5.5。

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。

That can be sustained against the induced drag of forward flight without significant loss in to vertical lift out puts to support the weight of the aircraft.

这可以持续反对前飞诱导阻力，在没有重大损失摆脱垂直放在支持飞机的重量。

When both are raised, overall lift fall and drag increases, so the aircraft descends.

当两边的扰流片都扬起时，升力就会下降，阻力增加，飞机下降。

Design elements include the drag and lift control technology, Huoti control system software and hardware design, communications systems, Huoti monitoring components.

设计内容包括电梯的拖动和控制技术，货梯控制系统的软硬件设计，系统通讯，货梯的监控等组成部分。

The configuration also provides acoustic shielding and, at low speed, increases aircraft lift without a thrust or drag penalty.

该构造还提供声屏蔽，并且在低速下，增加飞机升力的同时没有推力或阻力损失。

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。

It is shown that aerospike nozzle performance losses caused by free stream primarily result from increase of lift body base drag and decrease of plug pressure distribution.

结果表明，外流造成的性能损失主要体现在运载器底部阻力增加和塞锥表面压强降低两方面。

Increasing the lift drag ratio of turbine blade is an effective way for improving turbines aerodynamic characteristics.

提高叶轮机械叶片的升阻比，是改进叶轮机械气动性能的重要途径。

The relationship between the fluctuating drag and lift pressures in the turbulent area within a flow duct is given.

在管道通风系统中的湍流区内，震荡波动的阻力气压与推力气压之间的关系已被阐述。

The biggest lift drag ratio 3.36 considering viscous effects is obtained at Mach 6 when a proper base conical shock wave angle is chosen.

在设计点附近选取合适的半基准圆锥激波角并考虑粘性影响时，可得到乘波体最大升阻比为3.36；

External Ballistics deals with projectile flight. The trajectory, or path, of a projectile is subject to the forces of gravity (see gravitation), drag, and lift.

外弹道学是研究射弹的飞行，弹道是射弹在重力、拖曳力和升力作用下的飞行路线。

The aerodynamic drag and lift of javelin increase with angle of attack.

标枪的气动阻力、升力随迎角增加而增加。

The change rules of aerodynamic parameters including lift coefficient, drag coefficient and pitch moment coefficient have been analyzed when Angle of attack and fuel flow rate is changed.

考虑了不同飞行攻角、不同燃料流率下气动参数，包括升力系数、阻力系数和俯仰力矩系数的变化规律。