The robots had to pick up large balls and throw them into the trailers of opposing robots.

VOA: special.2009.04.24

We have 266, as some of you might know who saw me counting ping-pong balls the other day in office hours.

看到了这些发泡胶球事实上,可以当作单层金原子核,我们有266个乒乓球。

麻省理工公开课 - 化学原理课程节选

and hit balls as well from the back of elephants, amongst other things.

是从象背上去击球，除此之外都是一样的。

知道马球吗？ - SpeakingMax英语口语达人

It fires balls that burst and release a chili solution when they hit the elephant's skin.

VOA: special.2010.07.27

All right. So, we'll come around and get ping-pong balls to the rest of you.

还有什么问题吗？如果你们,还没有乒乓球的话请举手，还有问题吗？

麻省理工公开课 - 化学原理课程节选

The events of the day were followed by celebrations at ten official balls throughout Washington.

VOA: special.2009.01.24

Except for electromagnetism, the basics of mechanics, which is the motion of Billiard balls and trucks and marbles and whatnot, was set up by Newton.

除电磁学外,力学的基础,也就是台球,卡车,弹球以及其它小玩意儿的运动原理,都是由牛顿建立起来的

耶鲁公开课 - 基础物理课程节选

People will also attend many other parties and unofficial balls around the Washington area.

VOA: special.2009.01.19

Those of you who have your ping-pong balls can now begin the experiment.

好，我们会到这边来把球给你们,已经拿到球的同学就可以开始试验了。

麻省理工公开课 - 化学原理课程节选

The Obamas can also play tennis on a court on the South Lawn, hit a few golf balls on the putting greens or run around the jogging track.

VOA: special.2009.05.08

We have 266 ping-pong balls, and we need someone, hopefully you, to be some radioactive material that are going to be emitting these ping-pong balls. And when the time comes, in just a minute, I'll ask the TAs to come down and hand these out very quickly to you, so we can do this experiment.

你们有些人那天，看到我在办公室数乒乓球，我们需要几个人,希望是你,来作为放射材料，放射这些乒乓球,等会我会让助教,把这些球发给你们。

麻省理工公开课 - 化学原理课程节选

When Shepard did hit the golf balls, they traveled "for miles and miles," as he reported, because the gravity on the moon is one-sixth of the gravity on Earth.

VOA: special.2011.05.15

But in our case, the probability of backscattering is going to be the number of balls that backscatter, and that's going to be divided by the total number of ping-pong balls.

用20除以132000，但现在背散射,的概率是被散射回来的小球，除以总的小球数,你们记得。

麻省理工公开课 - 化学原理课程节选

Chris Wojciechowski is really cool." is a professional golfer, but he doesn't play the game with balls and clubs.

VOA: standard.2010.08.03

Another source of concern: the discovery of 20 tar balls off Key West,Florida on Monday.

VOA: standard.2010.05.18

In the U.S., some toys,like small rubber balls, must carry warning labels.

VOA: standard.2010.02.23