The balloons contain helium and oxygen so that they float around with the air currents.

VOA: special.2010.09.05

And waiting for you across the street ultimately will be a whole lot of balloons, a whole lot of candy, family, friends.

最后在马路对面等待你的,是家人和朋友的鲜花和掌声。

哈佛公开课 - 计算机科学课程节选

The last regular mail delivery was on September 19th, and thereafter they used balloons.

最后一封常规邮件于九月十九日发出,在那之后他们只能用热气球传送消息

耶鲁公开课 - 1871年后的法国课程节选

It's a cool day because everybody gets to give balloons and chocolates and all that stuff to the person you're in a relationship in or whatever."

VOA: special.2010.02.08

The old mans house is carried to South America by millions of balloons.

VOA: special.2010.03.01

You can see huge helium balloons, bands and costumed marchers.

VOA: special.2011.04.08

"For example,if we were working on combinations of six, there may be six balloons."

VOA: standard.2010.08.10

Marching with colorful balloons and dancing in the streets.

VOA: standard.2010.07.29

Nearby,on massive balloons, one can see the Colonel of a decade later, the man who backed extremists and terrorists, a pariah dubbed by the United States the "Mad Dog of the Middle East".

VOA: standard.2009.08.29

"But with those six balloons, one is green,five are yellow or they may have three of them to be large and three of them to be smaller, or we may have one with a star on it.

VOA: standard.2010.08.10