ballooning
/bəˈluːnɪŋ/ 5中考高考四级六级考研GRE托福Ballooning is the sport or activity of flying a hot-air balloon. 热气球运动
noun [具体名词]充气，鼓胀；气球操纵；乘热气球飞行；热气球运动
James hiked, fished, learnt to sail and experimented with hot air ballooning.
詹姆斯徒步旅行，钓鱼，学习驾驶帆船，还尝试了热气球。
单词造句:
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- Tilting there momently, shrill shirt ballooning 倾侧了一瞬，衬衫呼啸膨胀如气球
- The federal deficit and debt burden are ballooning. 美国联邦赤字和债务负担在急剧膨胀。