The ball curved through the air.

球在空中沿曲线运动。

The ball curved strangely in the air.

球在空中划出奇怪的弧线。

The ball looped high up in the air.

球高高飞起，在空中画了一条弧线。

In 'He grabbed the ball and threw it in the air', 'ball' is the antecedent of 'it'.

在He grabbed the ball and threw it in the air一句中，ball是it的先行词。

Stories were like air to me and while other kids played ball or went to parties, I lived out adventures through the books I checked out from the library.

故事对我来说就像空气一样，当别的孩子打球或参加聚会的时候，我却通过从图书馆借来的书，过着冒险般的生活。

As his sadness turned to anger, he kicked his new soccer ball into the air.

他的悲伤变成愤怒，他把他的新足球踢向了空中。

It can inflate (使膨胀) itself with water and air to turn into a ball several times of its real size.

河豚可以利用水和空气使自己膨胀，变成一个等于其数倍实际大小的球。

The ball is fully swelled with air.

这球已打足了气。

Of course, in reality, the baseball player knows better They give effect to the ball, they deal with air drag they spin the ball, and then these equations are not valid.

当然，还是棒球选手更了解现实情况,他们用特殊的抛球方式减小空气阻力,他们使球在飞行时带自转，这些公式就无法应用了。

All the gravity of all the mass in the cosmos should have been pulling the universe back inward, just as gravity pulls a ball back down to Earth after it's been thrown into the air.

宇宙中每一物体的每个引力都会对宇宙产生一个指向物体本身的拉力，就像在重力作用下，抛向空中的球会被拉回地面。

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。

"Clearly Darren Fletcher has won the ball," said Ferguson. "he's never touched Ashley Cole, who just jumped up in the air, and then [Didier] Drogba has pulled [Wes] Brown to the ground at the goal."

弗格森说：“很明显弗莱彻得到了球，他没有碰跳起来飞向空中阿什利·科尔，然后德罗巴在进球时已经拉倒了韦斯·布朗。”

The key to this is the reduced density of the atmosphere, which affects how fast the ball moves through the air and also the bend of a spinning ball.

此处的关键在于大气的折合密度，它会影响球在空中穿越的速度以及旋转球的弯曲度。

It's the basic physics that the air is thinner and the resistance to any projectile is less so the flight path of the ball will be different at high altitude.

基本物理学理论上，空气越稀薄情况下，任何物体的耐性都会减少，因此球路也会因海拔高度不同而有所变化。

Consider a ball that is spinning about an axis perpendicular to the flow of air across it (see left).

观察一个旋转轴与空气流动方向垂直的足球(见上图)。

There is air drag on that tennis ball.

网球受到空气阻力。

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。

The flow of air over the surface of the ball was turbulent, which gave the ball a relatively low amount of drag.

球的表面流动的空气形成湍流，这使得球的阻力相对较低。

The air outside the ball was ignored, and it was assumed that the air inside the ball behaved according to a compressive, viscous fluid-flow model.

分析假设球内空气的行为符合压缩、粘性流体流动模型。

Instead of falling to the ground, the ball popped into the air and landed in the outstretched arms of Broncos wide receiver Brandon Stokley, who started racing down the field.

球没有掉到地上，而是飞翔天空然后落进了开始跑向底线的野马队外接手Brandon Stokley伸出的手中。

But engineers are hoping that their pretesting—using compressed air to fire a ping-pong ball down the pipe, Gillies says—will prevent such a mishap.

但工程师们希望他们的预测试——使用压缩空气将乒乓球注入管道——也许可以避免此类事故， Giilies 认为。

Once a player has the ball in the air they need to try to weave it through hoops, towers and other obstacles.

玩家将小球升到半空后，他们需要尽量让这个摇摇晃晃的小球穿过铁环、玩具塔和其他障碍物。

Another shows the rippled skin of rubber seemingly clinging to a ball of water suspended in the air - before gravity brings the moment to an end.

另一幅图显示了起了涟漪的橡胶皮好像正依附于悬浮于空中的满球的水一样-在重力作用毁了这个瞬间之前。

While the Teamgeist ball was great for strikers, many goal keepers complained that the ball's aerodynamics created a lack of rotation in the air, making its path at times erratic, like a knuckleball.

由于“团队之星”独特的空气动力学设计，导致飞行的球在空中缺乏旋转，这种设计遭到了很多门将的诟病，他们认为这样的球飞行路径过于飘忽，难以判断。

And some players think something foul is afoot. They contend that the ball doesn't behave the way a normal soccer ball should, that it even turns the wrong way in mid-air.

一些球员对这种足球颇多不满，他们声称，这种球踢起来不像是个“足球”，飞到半空甚至会转错方向。

A number of players have insisted the new ball is too light and this is what makes its movements through the air more unstable.

部分球员坚持认为新的球太亮眼了，且飞到空中时方向不稳定。

As a soccer ball slows down after it's kicked in the air, the air flow around it changes from turbulent to smooth.

当球在空中速度减慢时，周围的气流从湍流变为稳定的层流。

The Real Madrid winger has everything you would want from an attacking player: dizzying pace, the ball skills of a freestyler, strength in the air;

这位皇家马德里的边锋具有你所希望的进攻球员所拥有的一切：极快的步伐、自由的控球技术、空中的能力；

Then she stands up and throw the ball into the air several times.

她唱着歌。然后站起来，一次又一次地把金球抛到空中。