And she brought with her a ping pong ball.
她带回一个乒乓球。
Now suppose you shoot this ping pong ball straight down.
现在假设你将乒乓球垂直向下射击。
Imagine you have one of those ping pong ball shooting guns.
想像如果你有一把乒乓球枪。
So, it is a sport that can be popularized like Ping Pong Ball.
原来这是象兵乓球一样可以普及的运动来的。
Size: Prototypes run from the size of a ping pong ball to basketball size.
尺寸：原型机可以由一个乒乓球变化到一个篮球大小。
This a white ping pong ball, it is round and is made of plastic, is made in China.
这是一个白色的乒乓球，是圆的，由塑料做成，是中国制造。
It is a white ping pong ball, it is round and is made of plastic, is made in China.
这是一个白色的乒乓球，是圆的，由塑料做成，是中国制造。
If Earth was the size of a basketball, all of its water would fit into a ping pong ball.
如果地球是一个篮球大小，就可以所有的水可以注进一个乒乓球。
It will tell you, say that you have a very small solid, I don't know like a ping pong ball in your flow, it tells you how it is going to start rotating.
假定你有一个小固体，比如说，流速场中的乒乓球，它会告诉你，乒乓球是怎样开始旋转的。
Here Hare shows off an experiment in measuring the radiant temperature which is basically a ping pong ball painted gray connected to a temperature and humidity sensor.
野兔在这里炫耀测量辐射温度基本上是一个乒乓球实验描绘灰色连接的温度和湿度传感器。
Backward for the practice, specifically using 2008 Beijing Olympic Games ping pong ball sports hall (the Peking University sports hall) design practice for the explanation.
下篇为实践篇，从2008年北京奥运会乒乓球馆(北大体育馆)的设计实践中具体地进行说明。
The goal is to get a ping pong ball into one of the opponent's cups by throwing the ball or hitting it with a paddle. If the ball lands in a cup, the opponent is required to drink the beer.
游戏者互相将乒乓球投入对方的酒杯中，球落入哪个酒杯就得把哪个酒杯里的酒喝光。
Finally, with the in body participation of the 2008 Beijing Olympic Games' ping pong ball sports hall (the Peking University sports hall) design, the author explains all the above conclusions.
最后，以亲身参与的2008年北京奥运会乒乓球馆(北大体育馆)设计来说明。
I like playing basketball, soccer ball, volleyball, ping-pong and so on.
我喜欢打篮球、足球、排球、乒乓球等。
这是一个乒乓球。
Tom doesn't have a ping-pong ball.
汤姆没有一个乒乓球。
For example badminton games volleyball games and ping-pong ball games.
例如羽毛球，排球和乒乓球。
We play soccer ball, basketball, volleyball, ping-pong and so on.
我们踢足球，打篮球、排球和乒乓等等。
It is intuitive that if the billiard ball hits the ping-pong ball that it will continue.
需要凭借直觉的是，台球撞击了乒乓球，而它继续运动。
Now, of course, it is way harder to see that the ping-pong ball gets twice the speed of the billiard ball, because we don't do...
当然，更难看出的是，乒乓获得了两倍的速度，是台球速度的二倍，因为我们并没有做。
Here we have not a bowling ball onto a ping-pong ball but we have a billiard ball.
我现在不让保龄球，去撞乒乓球，而是拿一个台球。
I will first bounce the ping-pong ball off the bowling ball... the billiard ball.
我首先撞击乒乓球，使它碰保龄球。，不，碰台球。
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.
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。
It's not going to be a backscatter event if your ping-pong ball hits the frame or these strings, or the top part.
打到原子核了就是背散射，如果打到框上。
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。
The ping-pong ball comes back - almost with the same speed-- not quite, 1 because the ratio is not infinity to one 1 but it is 500 to one, and the billiard ball will do practically nothing.
乒乓球会弹回来,几乎保持原来速度-,并不完全相同，比例并非无限大比,但它是500比，台球实际没有任何改变。
You hit the ping-pong ball with this paddle.
你用这个球拍打乒乓球。
You hit the ping-pong ball with this paddle.
你用这个球拍打乒乓球。
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