balloon [bəˈlu:n]有2个音节。
The balloon carried two large parachutes .气球携带着两个大型降落伞。
The balloons will start popping any minute now .气球马上就要爆了。
The colourful balloons rose high into the air ..五颜六色的气球腾空而起。
They like to go ballooning at weekends .他们周末喜欢乘气球玩。
Most big balloons are now filled with helium .现在许多大气球中充的是氦气。
