[ti:UNIT 4 Look into Science! Lesson 31: Surprise Your Friends!]
[0:00.598]UNIT 4 第四单元
[0:02.622]Look into Science! 走进科学！
[0:05.152]Lesson 31: 第31课：
[0:07.589]Surprise Your Friends! 让你的朋友们吃惊！
[0:10.533]To: 寄：
[0:11.591]Li-Ming@net. cn
[0:16.190]From: 来自：
[0:17.294]danny@intersaurus. com
[0:21.847]Subject: 主题：
[0:23.549]An Experiment! 一次实验
[0:26.033]Date: 日期：
[0:27.137]24/04 5:57 PM
[0:33.346]Hi, Li Ming! 你好，李明！
[0:35.002]Do you want to surprise your friends? 你想让你的朋友们吃惊吗？
[0:38.359]Brian, Jenny and I did an experiment in science class. 布赖恩，珍妮和我在科学课上做了一个实验。
[0:43.648]You can do it, too! 你也可以做！
[0:46.040]First, you need to get ready. 首先，你需要做好准备。
[0:49.076]Get a glass full of water and a piece of cardboard. 拿一只装满水的杯子和一张纸板。
[0:53.307]Tell a friend to sit down. 让一位朋友坐下。
[0:55.699]Cover the glass with the cardboard, and turn the glass over. 将杯子用纸板盖上，把杯子倒过来。
[1:00.666]Hold it over your friend's head. 把它举在你朋友的头顶上面。
[1:03.748]Tell your friend, "I am going to take my hand off the cardboard. 告诉你的朋友：“我将把我的手从纸板下面拿开。
[1:09.083]Will the cardboard hold the water in the glass?" 纸板会承受住杯子里水的重量吗？”
[1:13.498]"No, I don't think so," your friend will say. “不，我不认为是那样，”你的朋友一定会说，
[1:18.512]"Keep your hand on the cardboard, please!" “请将你的手放在纸板上！”
[1:22.237]Next, take your hand off. 接着，拿开你的手。
[1:25.181]The cardboard will hold the water up! 纸板将承受水的重量而不使它掉下来！
[1:28.676]Air is heavier than we think! 空气比我们想象的要强大！
[1:31.712]It pushes down on us from above. 它从上面给我们以压力，
[1:34.870]It also pushes up on us from below. 也从下面给我们以压力。
[1:39.101]In the experiment, air pushes up on the cardboard. 在这个实验里，空气给纸板向上的压力。
[1:44.068]But it can't push down on the water because the water is inside the glass. 但是它不能给水以向下的压力因为水装在杯子里。
[1:50.875]The air holds the water! 空气支撑着水！
[1:53.727]Science is interesting. 科学很有趣。
[1:56.165]Don't you think so? 你不那么认为吗？
[1:58.510]Your friend, 你的朋友，
[1:59.798]Danny 丹尼
[2:01.224]Did you try this experiment? 你试过这个实验吗？
[2:04.857]LET'S DO IT! 做一做！
[2:06.130]Prepare an interesting experiment you have tried before or have seen in your science books. 准备一个你试过的或是在你科学书上看过的有趣实验。
[2:13.073]Do it and describe it to your class. 做实验并向你的同学们描述。
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