balloons

英 [bəˈluːnz]

美 [bəˈluːnz]

n. 气球; 热气球
v. (突然)膨胀，涨大; 乘热气球飞行
balloon的第三人称单数和复数

柯林斯词典

N-COUNT 气球
Aballoonis a small, thin, rubber bag that you blow air into so that it becomes larger and rounder or longer. Balloons are used as toys or decorations.
1. She popped a balloon with her fork.
  她用叉子戳破了一个气球。
N-COUNT 热气球
Aballoonis a large, strong bag filled with gas or hot air, which can carry passengers in a container that hangs underneath it.
1. They are to attempt to be the first to circle the Earth non-stop by balloon.
  他们试图完成乘热气球不间断环球飞行的创举。
VERB （数量）激增，猛涨，快速膨胀
When somethingballoons, it increases rapidly in amount.
1. In London, the use of the Tube has ballooned...
  在伦敦，坐地铁的人激增。
2. The budget deficit has ballooned to $25 billion...
  预算赤字已经猛增到250亿美元。