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Sounds (声音) go faster in water than in the air. ……

The right lung takes in more air than the left. ……

Use this flowlight (流光笔) to draw a picture in the air! ……

Most cars use gas. But this car uses air! It is in the US. There is a machine in the car. It uses air to give the car power. ……

Air can crush metal cansThis demonstration (展示) shows you how powerful air pressure can be. ……

it into the air, it cleans the air. There are small filters (过滤器) in it. It can take in bad air and put out clean air. ……

瑞士公司售卖阿尔卑斯山区空气。 You may buy bottled water from time to time. But will you buy bottled air?A Swiss company has started to sell local air. Swiss Alpine Air is bottling the fresh air from the Alps (阿尔 ……

Try this A delicate balance 1.Set the dryer its colest setting2.Turn on the dryer with its air stream pointing upward, and see if you can balance the ball on the air stream3.After the ball ……

Air Swimmers 空中游鱼玩具This "fish" swims in the air. How strang (奇怪的) ! It's a new toy called Air Swimmer. You can make it fly up, down and turn over (翻转) with a controller (遥控器). ……

This light is like magic. It can float (漂浮) in the air. It can also follow people. How can this be? Here is the answer: it uses drone technology (无人机科技). You can put it anywhere in the air ……

A: I'm going on holiday with my family.B: Where are you going?A: I don't know. The decision is still up in the air.--------------"Up in the air": 一切尚未确定。 ……

LOOK at the icicles (垂冰) clinging (紧贴) to the air conditioner. Doesn’t it look like the air conditioner is crying? It may think: “Most of the time it is my job to cool the room, but now the naughty ……

thin air 无影无踪，虚无的状态The detective’s speculation doesn’t come from thin air.这位侦探的推测并非空穴来风。 ……

为什么热气球会飞？Hot air rises5. A heater (加热器) fills the balloon with hot air. So the balloon rises, too. ……

自动打气筒This is called Air Pot. It can help you pump up (打气) your bike tire (轮胎). You press a button (按钮), and it starts to send air into the tire. ……