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 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。
One afternoon, the home-made ball was spinning across the grass when it was suddenly stopped by someone.
一天下午，这个自制足球正在草地上滚动着，突然被人拦住了。
Magnetic levitation, or maglev, holds the ball in place while it spins around, getting clothes cleaner than a circular-spinning drum ever could.
磁力悬浮，或者磁悬浮，使这个旋转的球始终保持在同一位置，比循环滚动机器洗得更干净。
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)。
The movement of a golf ball against air with spinning is analyzed.
对实际中有旋转的高尔夫球运动进行了分析。
A typically astonishing routine would see a female gymnast launching a ball high into the air, spinning and contorting her body as it drops to the ground, before catching it in the curve of her neck.
一个十分典型的动作就是女选手将球高高抛到空中，旋转并俯身到地上，在球掉落之前用弯曲的颈部将球接住。
The earth hums to me today in the sun, like a woman at her spinning, some ball AD of the ancient time in a forgotten tongue.
今天大地在太阳光里向我营营哼鸣，象一个织着布的妇人，用一种已经被忘却的语言，哼着一些古代的歌曲。
The ball was spinning when it came towards me.
那球飞过来时还在旋转。
The basic principle with respect to ball spinning is introduced, and based on plastic mechanics, the influence of mechanical parameters on formability of spun parts is analyzed.
介绍了滚珠旋压的基本原理，以塑性力学为基础，分析力学参数对旋压件成形性的影响。
I could see the ball spinning as it came towards me.
当那球飞来时我可以看到球在旋转。
As a successively and locally plastic deformation process, ball spinning is applied for the purpose of manufacturing thin-walled tubular parts of aluminum alloy.
作为一种连续局部塑性成形工艺，滚珠旋压被应用于制造铝合金薄壁筒形件。
The mesh of copper tubes and loading ways of the balls are the key problems during three dimensional FE simulation of ball spinning of inner grooved tubes.
内螺纹管滚珠旋压三维有限元模拟中，铜管的网格划分和滚珠加载方式是模拟的关键问题。
Different technological parameters of ball spinning are simulated.
对不同工艺参数下的滚珠旋压过程进行了模拟。
What was and what is and will be on this blue-green ball spinning as fast as we can, with rocks, water, air, you and me.
在这个有岩石、水、空气，有你和我的飞快旋转的蓝绿色星球上，它的前世、今生和未来是什么?。
As a successively and locally plastic deformation process, ball spinning is applied in order to manufacture high-strength and high-precision thin-walled tubular part with longitudinal inner ribs.
作为一种连续局部塑性成形工艺，滚珠旋压被应用于制造高强度、高精度的纵向内筋薄壁筒形件。
Through simulation, the flow rules of metal are obtained during the steady deformation of ball spinning, it coincides with results of experiment.
通过模拟，获得了滚珠旋压稳态下的金属的流动规律，与试验结果相吻合。
New chemical composition and additional built-in tension make the ball more spinning and its trajectory significantly higher.
新的化学配方及附加的内能技术使球具有更多的旋转与更凌厉的弧线。
Therefore, the spinning of thin-walled tube with large thickness reduction can be realized through multi-pass ball spinning.
因此，通过多道次滚珠旋压可实现大减薄量薄壁筒形件的旋压成形。
Shawna squinted into the bright sky until the spinning circle appeared, as tiny as a golf ball, she held her breath as it got closer and closer.
肖恩眯着眼睛向蔚蓝的天空眺望，直到小圆球旋转而来，像高尔夫球一样小，当它越来越近的时候，她屏住了呼吸。
Before you drop the ball into the spinning wheel, you bet a number on the electronic layout.
在你把小球投入转盘之前，先在布局上赌个号码。
Before you drop the ball into the spinning wheel, you bet a number on the electronic layout.
在你把小球投入转盘之前，先在布局上赌个号码。
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