【英语时差8,16】防火气球-上

Wanna see a trick? Sure. Here, blow up this balloon¹. Ok, now what? Now, I light this candle. Now what do you think will happen if I put the flame² under the balloon? It’ll pop, of course. The flame will heat the rubber to the point where it becomes weak and can’t hold up under the pressure³ from the air inside. Right, except not always. What do you mean? Watch, first I'll put about a quarter cup of water in the balloon and blow it up. There, now hold this while I light another candle. This is the trick, right? You pop it and I get wet.

1 balloon   

n.气球

参考例句：

• The balloon rose up slowly in the sky.气球冉冉升上天空。
• This is a hot air balloon.这是一个热气球。

2 flame   

n.火焰，火舌，热情；v.焚烧，面红，激动

参考例句：

• The flame of the burning candle soon went out.蜡烛的火焰很快就熄灭了。
• The flame blew out.火苗吹灭了。

3 pressure   

n.压力，压迫，压强；vt.迫使，使增压，密封

参考例句：

• He changed his mind under the pressure from others.他在别人的逼迫之下改变了主意。
• This type of sheet steel could stand high pressure.这种薄钢板能抗高压。