高中英语人教版2003年高一下04

[07:27.29]chromatography comes from the ancient Greek language
[07:29.97]色谱法来自古希腊的语言.
[07:32.65]and means "writing with colour".
[07:34.67]意思是"颜色的呈现"
[07:36.70]It separates the colours in liquids,such as ink.
[07:39.12]它在液体中分离颜色,比如墨水.
[07:41.53]Paper chromatography is a simple experiment and easy to do in class.
[07:44.91]在教室里,色谱法是一个很简单很容易的实验.
[07:48.30]Materials:white paper towels or napkins,two glasses or cups.
[07:52.37]原料:白色的纸毛巾或餐巾纸两个玻璃杯或杯子.
[07:56.45]scissors,two pencils,
[07:58.82]剪刀,两只铅笔
[08:01.20]two markers(Black and brown work best.)a stapler,some water
[08:05.59]两只蜡笔(黑色和褐色最好工作)一个订书机,一些水
[08:09.98]Instructions:
[08:11.44]说明书:
[08:12.90]1.Cut strips out of the paper towels or napkins
[08:16.03]1.把纸毛巾或餐巾纸剪成条.
[08:19.15]that are about as long as the height of the glasses or cups.
[08:21.93]只要高过玻璃杯或杯子
[08:24.71]2.Fold the end of each strip over,and then staple it.
[08:27.99]2.把每个纸条折叠起来然后订住它.
[08:31.27]3.Make a clear dot of ink near the bottom of each strip.
[08:34.65]3.在纸条的底部用墨水打个点.
[08:38.03]4.Put some water in each glass or cup.
[08:40.82]4.在玻璃杯或杯子里放些水.
[08:43.60]5.Hang the strip on the pencil and put the pencil on top of the glass or cup.
[08:48.13]5.把纸条挂在铅笔上然后把铅笔放在玻璃杯或杯子的上面.
[08:52.66]6.Put the bottom of the paper strip in the water,
[08:55.55]6.把纸的底部放进水里面去.
[08:58.44]but the water should not touch the ink dot.
[09:00.71]但水不能接触到墨水.
[09:02.98]Make sure the ink stays above the water and the paper stays in the water.
[09:06.30]要确定墨水在水的上面而纸停留在水里面.
[09:09.62]7.Allow the water to go up through the strip
[09:12.49]7.水随着纸上升.
[09:15.36]and watch what happens to the ink dot.
[09:17.49]会看到墨水点有什么变化.
[09:19.62]Description and explanation
[09:21.45]解释说明
[09:23.28]The water moves up through the paper.
[09:25.32]水随着纸慢慢移动
[09:27.35]When it comes to the ink dot,the water takes the ink with it.
[09:30.58]当它来到墨水点的时候,墨水点就被夺走了.
[09:33.81]As the water moves up the strip,
[09:35.74]当水蔓延到纸条上.
[09:37.67]the black or brown ink dot changes shape and colour.Ink is a mix.
[09:41.36]黑色或褐色的墨水点就变了形状和颜色.这时的墨水是混淆的.
[09:45.04]For example,black ink contains several colours.
[09:47.91]比如,黑色的墨水包含有不同的颜色.
[09:50.79]Not all colours"travel" at the same speed.
[09:53.36]不是全部的颜色都是同样的速度.
[09:55.93]Some end up much further away from the dot.
[09:58.36]有些颜色远离这个点.
[10:00.79]That is why we see the colours spread out like a rainbow.
[10:06.01]这就是我们为什么会看到这些颜色展成一条彩虹.