1、气球的英语：balloon，英 [bəˈluːn] 美 [bəˈluːn]。

2、有人在她背后弄爆了一个气球，把她吓了一跳。She jumped as someone popped a balloon behind her.

3、你再给气球充气，它就要爆了。That balloon will burst if you blow it up any more.