Wind is a current of air caused by a vacuum caused by hot air rising.

风是由热空气上升产生真空而引起的空气流动。

That's not just hot air.

那不仅仅是吹牛。

Are you full of hot air?

你在吹牛吗？

It uses hot air.

它使用热空气。

A balloon can fly in the air because hot air rises.

气球能在天空飞是因为热空气会向上升。

The cause appears to be in part greater turbulence in the urban atmosphere as hot air rises from the built-up surface.

部分原因似乎是热空气从楼宇密集的表面上升，造成城市大气的更大湍流。

His justification for the merger was just hot air.

他提出的合并理由只是连篇空话。

A blast of hot air hit us as we stepped off the plane.

我们下飞机时，一股热浪向我们袭来。

How to fly a hot air balloon?

如何驾驶热气球？

The rain can cool the hot air.

那场雨使闷热天气凉快了不少。

Here I am in a hot air balloon.

这是我坐在一个热气球里。

Hot air flowing under the floor kept readers' feet warm.

地板下流动的热气使读者的脚保持温暖。

I've always wanted to go up in a hot air balloon.

我一直想坐热气球上去。

Melissa asked her mom if she had ever been in a hot air balloon.

梅丽莎问她妈妈她是否坐过热气球。

All that the fan blows is hot air.

电扇吹出来的都是热风。

I colour the hot air balloon green.

我把热气球涂成绿色。

Have you ever been in a hot air balloon?

你乘过热气球吗？

This sounds like hot air, but it looks cool.

这听起来像是无稽之谈，但看起来棒极了。

Flying a hot air balloon is full of challenges.

驾驶热气球是一件充满挑战的事。

Making your own hot air balloon is easy and fun.

制作自己的热气球既简单又有趣。

I would love to take a girl on a hot air balloon ride.

我想带女孩来一次热气球旅行。

The evening party ends with a hot air balloon competition.

晚会最后以放热气球比赛来结束。

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。

Along the way are tales of kings and queens, hot air balloons and monkeys in space.

一路上都有国王，皇后，热气球和太空猴子的故事。

When the lanterns are lit, they slowly rise into the air like small hot air balloons for all to see.

当灯笼被点亮时，它们就像小热气球一样慢慢升到空中，供所有人观赏。

This sounds like so much hot air, but the near $13 billion fortune this entrepreneur has amassed comes from practical achievements rather than hypothetical ones.

这听起来像是夸夸其谈，但这位企业家积累的近130亿美元的财富来自实际的成就，而不是假想的成功。

Oriented to the prevailing wind, the front wall of perforated cardboard, moistened and cooled by a trickle of seawater pumped in, cools and moistens hot air blowing in.

盛行的风穿过带孔的纸板墙，注入凉爽湿润的海水，清爽潮湿的热风也涌了进来。

This was not just inaugural hot air.

这并不是就职时的空话。

Five years ago, I was full of hot air.

五年前，我是一个夸夸其谈的人。

The machine circulated hot air by convection.

这个机器使热空气通过对流来循环。