随着球向山下滚动，它的速度越来越快。
它可以研究人类球员的动作和球的速度。
It can study the movements of human players and the speeds of the ball.
英格兰队可能有更多的企图和速度，但他们无法控制住球。而两个边锋则会为他们得到的支持而失望。
England may have had more purpose and speed but they were unable to command the ball and the wingers would have been disappointed with the service to them.
清单1 中的源代码给出了一个简单的例子，这个环境中中存在火星的地心引力，里面有一个球具有向上的速度。
The source example in Listing 1 shows a simple world with Mars' gravity and a sphere that currently has some upward velocity.
高尔夫球发射时，其水平速度是多少？
What is the horizontal velocity of the golf ball when it takes off?
这个球静止了，而这个获得了速度-，这非常神奇。
Then you see this one stands still - and this one takes over the speed — quite amazing.
然而，阻力系数CD，也取决于球的速度。
It appears, however, that the "drag coefficient", CD, also depends on the velocity of the ball.
球越低，速度越快。
“潜入诱饵球中非常危险。海豚高速度冲入，总会发生危险的冲突。”他说。
Diving in a bait ball is very dangerous. Dolphins are charging at high speed and there is always danger of clash, "he said."
威尔谢尔的技术比马克莱莱更好，速度相对较慢。但是当他接到球的时候，他比马克莱莱更有威胁。
Wilshere is better technically than Makelele. He's slower than Makelele but when he receives the ball he is more dangerous than Makelele.
而里奥则跑动更多，用他的速度来追到球。
在球运行路径的某一点(10米处，或人墙的位置)球的速度下降，使空气在球体表面形成较稳定的层流。
Some way into its path - perhaps around the 10 m mark (or at about the position of the wall of defenders) - the ball's velocity dropped such that it entered the laminar flow regime.
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。
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.
投球机器人投出泡沫塑料球的速度可达25英里/小时，但石川更希望将速度提高至93英里/小时，使其可以发出低于常速的投球，如曲线球和滑球。
The pitching robot throws a plastic foam ball at 25 miles per hour, but Ishikawa is hoping to increase the speed to 93 mph and make it able to throw off-speed pitches like curves and sliders.
由于这个环境中具有地心引力，因此向上的速度不会坚持很久；最后这个球会上升到顶点并开始下降。
Given that the world has gravity, that upward velocity won't last long; eventually, the sphere reaches the apex and begins its descent.
他们认为，尤其在类似篮球和橄榄球这样的高速度体育项目中，这样做能大大减少伤害。
They believe that especially in similar speed sports such as basketball and football it can greatly reduce injuries.
他的反应，速度，灵活，以及化解对方单刀球的能力为他在俱乐部和国家队都赢得了“圣伊戈尔”的称号。
His reflexes, speed, agility and the ability to shut down one on one threats has earned him the nickname Saint Iker by both club and national fans.
我速度太慢以至于不能踢足球，而12岁时的致命弧线球和灌篮到了16岁却没有什么长进。
I was too slow to play football, and my devastating curve and drop at 12 didn't come with any more break at 16.
乘客们在一辆球型车头“和谐号”列车前合影留念。这辆列车将以每小时300公里的速度把乘客从北京载往毗邻的河北省。
PASSENGERS pose for photographs in front of the bulbous "Harmony" train, which will whisk them from Beijing through neighbouring Hebei Province at almost 300km an hour.
利比亚在左边防线受到对方球员拦截，他转换速度，连过两名后卫，从地上将球攻入球门的右上角，球进了。
Trapped against the left touchline he showed a devastating turn of pace to speed in-between two defenders and slam a shot into the top corner from inside the box.
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。
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.
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。
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.
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。
As a soccer ball slows down after it's kicked in the air, the air flow around it changes from turbulent to smooth.
而里奥又有身体又有速度，能够很好地分球发起进攻。
Rio is athletic and fast and able to play on the ball distributing the ball much better to starting attacks.
我们只看台球-，完全忽略乒乓球-，来看看台球的速度，它实际未受碰撞影响。
Look at the billiard ball alone — - forget the ping-pong ball — and try to see that the speed of the billiard ball is practically unaffected by the collision.
墙的另一边没有分子，因此吸引力，会降低球的速度。
There are no other molecules on that side of the wall. So there's an attractive force that makes the velocity within not quite as fast.
墙的另一边没有分子，因此吸引力，会降低球的速度。
There are no other molecules on that side of the wall. So there's an attractive force that makes the velocity within not quite as fast.
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