ballon 用英语:

There is an advertising balloon flying above the department store.

The balloon descended slowly.

Everybody in the park looked up at the hot air balloon.

She pricked the balloon.

He scared the hell out of me by popping a balloon right next to my ear.

The surface of a balloon is not an Euclidean space, and therefore does not follow the rules of Euclidean geometry.

Up and up rose the balloon, until it was seen no more.

Children like playing with balloons.

The balloon was carried away somewhere by the wind.

Do you know who attempted to fly around the world in a balloon?

It was a friend’s birthday and he got some balloons that he didn’t want so he gave them to me.

She has made computer models of how spiders balloon

Could you help me to blow up some balloons?

The rumours soon ballooned into a full-blown scandal.

The phlebotomist scared herself by practicing her craft on a balloon.

And since they're so small, hundreds of millions can fit in a small flask.

a flask of brandy

... my lab holding a flask of a liquid culture...

Several substance are mixed into the flask.

In the cold season when you want to drink something hot I recommend this sort of thermos flask.