气球的英语单词是：balloon
n.气球;热气球;[建]球饰
vt.膨胀，涨大;乘热气球飞行;使激增
adj.气球状的;（货物等）分量轻而体积大的;
vi.乘气球飞行;膨胀;激增
例句：
That balloon will burst if you blow it up any more.
你再给气球充气，它就要爆了。
They decorated the room with flowers and balloons.
他们用花和气球装饰了房间。
Goodness, what a big balloon!
啊，好大的气球呀！
The room was decked out in flowers and balloons.
屋子里装点着鲜花和气球。
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