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英语煎蛋小学堂视频百科78 :精美的雪花是如何形成的 高清(MP3+中英双语)

cocotang 于2014-12-23发布 l 已有人浏览
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英语视频:煎蛋小学堂78 :精美的雪花是如何形成的 高清,以幽默诙谐的方式为你解答那些那些你意想不到的科学小知识,含有中英双语字幕视频,mp3下载。
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The snowflake might be the world's favourite symbol of winter,The surprisingly complex and beautiful shapes are made of ice,Nuature's simplest hydrogen bond crystal,But how are these delicate structures formed?

雪花或许是世界上最招人爱的冬天的象征,由冰晶构成的令人惊奇的美丽形状,大自然最简单的氢键晶体,但这样精美的结构是如何构成的呢?

No two snowflakes form in the exact same way.But here's a possible set of steps.A snowflake starts as dust grain floating in the cloud,Water vapor in the air sticks to the dust grain,And resulting droplet turns into ice,Crystal faces appear on the frozen droplet,Then a prison froms with six faces and a top and a bottom.

没有两片雪花的形成过程是完全一样的,这里说的是一种可能的过程,一片雪花的形成首先从云层中尘埃颗粒开始,空气中的水蒸气粘附在尘埃颗粒上,由此产生的液滴变成了冰,结晶面出现在冰冻的液滴上,之后形成一个六个侧面 一个上面和一个下面的棱体。

A cavity forms in each prison face,Because ice grows fastest near the edges,Faster grows on the corners causes six branch sprout,The lines in each branch are due to ridges and grooves on the surface,The six branches form the corners of the hexagon which forms into the shape.Because the water molecules chemically bond into a hexagonal network.

由于边缘冰生长速度比较快,所以每面都会出现一个凹槽,边角的快速生长导致六条支线开始萌芽,每条分支上的线是因为表面的凸脊和凹槽,六条分支形成六边形的角形成各种形状,因为水分子通过化学键结合成六边形的网状结构。

When the temperture cools to nine degrees fahrenheit,New growth branch tips norrow.As six degrees side branches begains sprout.Suddenly the crystal encounters quick blast of warmer air followed by cooler air.And even more side branches sprout.The crystal gradually warms making the tips long and narrow.The crystal falls into even warmer air.Which slows the growth and widen the tips.

当气温降到9华氏度时(-12.8摄氏度)新生的分支尖端开始变窄,6华氏度时(-14.5摄氏度)侧向分支开始出现,这时晶体突然遭受了一阵快速爆发的暖流接着又是冷气,更多的侧分支开始形成,晶体渐渐受热使得尖端又长又细,晶体降落到暖和的空气中,就不再生长 尖端却越来越宽阔。

Finally this unique and delicate strucure falls to the earth.Along with countless other snowflakes,The old saying that no two snowflakes are like.Maybe ture for larger snowflakes,But not for smaller simplier crystals that fall out of the sky at earlier stages,Before the had a chance to fully develop,Still the ever changing environment and many ways that H2O combind in the crystal surface.Means that snowflakes can never mind-boggling array of shapes,But they have one thing in common,They are all easy on the eyes.

最终这种独特而精美的结构飘落红尘中,伴随着不计其数的雪花同伴,古语云没有两片雪花是一样的,这或许对大片的雪花成立,但对初期处于刚开始形成阶段的小晶体来说却不一定,因为它们都还没有机会充分生长,由于不断变化的环境,和在晶体表面的水分子结合方式的不同。意味着雪花绝不会形成同样的形状组合,但它们有一个共同之处,它们都十分养眼。

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