英语听力论坛 » 【VOA快速教室】 » VOA标准英语2012.12.29

Rebecca949 发表于 2012-12-29 09:59

VOA标准英语2012.12.29

[audio]http://sound.yywz123.com/tingbbs/voab/voab20121229.mp3[/audio]




Even as adults we still enjoy blowing bubbles, don't we? If you've ever wondered why blowing on a thin film of soapy water creates bubbles, this is your lucky day.即使是作为成年人的我们也仍然喜欢吹泡泡,不是吗?如果你曾疑惑过为何肥皂水薄膜能吹出泡泡,那今天,你的问题就有幸得到解决. ________________________.Take water, for example. Water molecules are strongly attracted to each other.比如说水.水分子之间互相强力吸引. Therefore the molecules on the surface of the water are not attracted towards the air, but rather towards the rest of the water. This attraction is what creates surface tension, forming a sort of skin on the water's surface.因此,水表面的分子会被其余的水分子所吸引,而不是被空气分子吸引.引力产生表面张力,在水面形成一层类似皮肤的东西.



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lichang119 发表于 2012-12-29 12:56

版主辛苦了

簿子酒 发表于 2013-1-2 22:52

{:7_284:}it's difficult to catch...

i852774842 发表于 2013-1-5 16:07

All liquids hve a property called surface tension.

xiaohuozi 发表于 2013-1-21 01:07

谢谢分享，学习了。

xinmylily 发表于 2013-1-31 16:50

All liquids have proper service tension

MichaelArthur 发表于 2013-2-8 21:25

all liquids have property calls sunface tension

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