首页-日语 - 地盘 - 记录 - 日志 - 下载 - 查词 - 翻译 - 排行
F8键(暂停/播放)| F9键(重复此句)| 左键或ALT+Z(上一句)| 右键或ALT+X(下一句)
提示:听写播放器因为flash插件问题无法播放,请点击此处解决
听写窗口
译文窗口
注释窗口

您没有登录,系统不能保存您的听写记录和听写错词,点击此处登录

听写提交之后可查看原文
This is Scientific American's 60-second Science, I'm Adam Levy.
Water molecules can arrange themselves to form much larger structures.
Take intricate snowflakes, which form all by themselves in the right conditions.
Well, now researchers have created some delicate water structures of their own, in the form of microscopic ice mazes, with a little help from light.
The team took some sugar water, and kept it at a temperature where ice crystals and water can happily coexist.
They then exposed the H2O to infrared light at a particular frequency that is absorbed much more easily by the ice crystals than it is by the water.
"We thought that something interesting would happen when you illuminate ice which absorb more than water.
Because once the ice is melting, then it becomes liquid water and then it absorbs less,
so you have kind of a negative feedback situation.
And we did not know what will happen with this."
Physicist Ido Braslavsky from the Hebrew University in Jerusalem.
The heating caused by the light melted tiny holes into the crystals.
These holes sometimes joined up to form channels,
and the researchers watched as a labyrinth-like pattern gradually formed over the course of an hour.
"At some point we suddenly saw a whole spectrum of patterns that appear.
There were holes that opened and closed, there were channels that were appearing.
这里是科学美国人――60秒科学系列,我是亚当・利维。
水分子可以自行排列成大得多的结构。
以复杂的雪花为例,它们都是在合适的条件下自已形成的。
现在,研究人员在光的帮助下,创造出了他们自已的微妙水结构,展现形式为微小的冰迷宫。
研究小组取了一些糖水,并将其保持在冰晶和水可以和谐共存的温度下。
之后,他们让水接触特定频率的红外线,在这一频率下,冰晶比水更容易吸收红外光。
“我们认为当你说明冰吸收的红外光比水多时,会发生一些有趣的事情。
因为冰一旦融化就会变成液化水,之后它吸收的就少了,
所以会出现一种负反馈的情况。
我们不知道这会发生什么。”
以色列耶路撒冷希伯来大学的物理学家伊多・布拉斯拉夫斯基说到。
光引起的加热融化了晶体上的小孔。
这些小孔有时会连接起来形成通道,
研究人员观察到,在一个小时的过程中,一个迷宫般的图案逐渐形成。
“在某一时刻,我们突然看到了整个系统图案的出现。
不仅有开口和闭口的小孔,还出现了一些通道。
暂无注释
听写注意
1.为防止灌水听写至少要输入超过10个单词方可提交同时听写内容不能粘贴;
2.标点符号不用填写,听写比对会忽略掉标点符号;
3.单词与单词之间要留有空格,同时数字(年月或金额)请用阿拉伯数字。
可友留言
加载中...
我来说2句
抱歉,您需要先登录后才能留言
谁正在听写
得分最高
最新听写
热门听写