ballooning

名词 ballooning:

1. flying in a balloon

动词 balloon:

1. ride in a hot-air balloon
   同义词：balloon
2. become inflated
   同义词：balloon, inflate, billow

1. Who was the first man to make an ascent in a balloon?
   第一个乘气球升空的人是谁?
2. They like to go ballooning at weekends.
   他们周末喜欢乘气球玩。