The first pictures of Earth taken from space showed a solid ball covered by brown and green landmasses and blue-green oceans.

VOA: special.2011.01.04

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。

麻省理工公开课 - 化学原理课程节选

I started out playing T-ball which is, there's no pitcher.

我一开始打的是简易棒球，是没有投手的那种。

会打棒球吗？ - SpeakingMax英语口语达人

Kenya - the birthplace of Barack Obama's father - will host the Africa and International Friends Inaugural Ball.

VOA: special.2009.01.19

So, it'll be considered a backscatter event if your ping-pong ball hits one of the nuclei.

什么情况是背散射,如果你们的乒乓球。

麻省理工公开课 - 化学原理课程节选

Betty Bonney sings about the way DiMaggio hit the ball very,very hard -- how he jolted it.

VOA: special.2011.04.04

What does it feel like to be the machine while it's looking at-- while it's got its little light sensors pointed at--the red ball?

当机器以电子眼,对着那个红色的球,它会有什么样的感觉

耶鲁公开课 - 死亡课程节选

The twenty-one year-old throws a sharp breaking ball that cuts across the plate at the last second.

VOA: special.2010.06.18

He has a little ball. A little two- or three-year-old kid has a ball.

他有一个小球，一个两或三岁的孩子有一个球。

耶鲁公开课 - 1945年后的美国小说课程节选

The bottom of the root ball will look something like the spread-open wings of a butterfly.

VOA: special.2011.04.19

The average speaker knows, as a low-ball estimate, about 60,000 words.

保守估计,说话者平均知道大约六万个词

耶鲁公开课 - 心理学导论课程节选

At the base of the hair root is a small ball-like formation called a bulb.

VOA: special.2011.04.05

There are three ways, the goal--the attacker could kick the ball.

罚球队员可以选择三种不同射门路径

耶鲁公开课 - 博弈论课程节选

In nineteen nineteen, he hit the ball out of the baseball park twenty-nine times.

VOA: special.2011.03.27

You have a tube, a transparent--a tube--a hollow tube, and at the top of the tube you throw a ball through so it whips through the tube and it comes out.

用一根管子,一根透明中空的管子,从管子最上面,你丢进去一个小球,小球迅速穿过管子,飞出来

耶鲁公开课 - 心理学导论课程节选

ERIC: Why you shooting down my game?Let a playa play. MIKE: Yeah, okay.What you playing at, T-Ball?

VOA: standard.other

Raise your hand if you don't if you don't have a ping-pong ball yet.

这样就可以算,背散射的概率了。

麻省理工公开课 - 化学原理课程节选

In the ninth inning, Tampa Bay batter Gabe Kapler sent a ball heading for the stands in left-centerfield, threatening a home run and spoiling Buerhle's perfect game.

VOA: standard.2009.07.24