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UNIT 5 Lessons 25-30 Look into Science
第五單元 第25-30課 科學探究
Lesson 25: Let's Do an Experiment!
第25課 我們做個實驗吧！
Danny, Jenny and Brian are in the lab.
丹尼，珍妮和布萊恩在實驗室。
Let's do an experiment. I fill a jar with water.
我們做個實驗吧。瓶子里裝滿水，
I cover the top with a piece of cardboard and hold it there.
用一塊硬紙板蓋住瓶口，并壓住紙板。
Then I turn the jar upside down and take my hand off the cardboard.
接下來，將瓶子倒過來，把手從紙板上拿開。
Can you guess what will happen?
你能猜到，將會發生什么嗎？
I think the floor will get wet. We should do this experiment outside, Brian.
我想地面會被弄濕。我們應該到室外做這個實驗，布萊恩。
I think the cardboard will hold the water.
我認為紙板會托住瓶子里的水。
I don't think so.
我不這么看。
You think the water will pour out, Danny. I think the water will stay in the jar.
丹尼，你覺得誰會涌出來。我認為水會留在瓶子里。
Let's test which theory is correct.
我們來測試下哪種推測是正確的吧。
Good idea, Jenny. That's called the scientific method.
好主意，珍妮。這被稱作為科學方法。
I am so sure of my theory that Brian can do the experiment over your head and I know you won't get wet.
我非?？隙ㄎ业耐茰y，因此，布萊恩可以在你頭上來做這個實驗；并且，我認為不會淋濕你。
Well, let's try it!
嗯，那我們試一試！
Are you ready, Danny?
你準備好了嗎，丹尼？
No! Wait! (He puts on a raincoat and sits down.) Now I think I'm ready.
不！等一等！(他穿上雨衣，坐了下來。)我想，現在我準備好了。
Brian, take your hand off the cardboard.
布萊恩，把你的手從紙板上拿走。
No!
不！
(Danny closes his eyes tightly, and Brian takes his hand off the cardboard.
丹尼緊緊地閉上眼睛，布萊恩把手從紙板上拿開了。
The water stays in the jar.)
水仍然留在了瓶子里。
See, Danny!
看，丹尼！
How is that possible?
怎么可能？
The force of the air keeps the water in the jar.
空氣的壓力讓水留在瓶子里。
It is strong enough to hold the water.
空氣的壓力足夠大，能托起（瓶中的）水。
Wow!
哇哦！
So what have we discovered?
那么，我們發現了什么？
We have discovered that the air pressure helps the cardboard hold the water in the jar.
我們發現，大氣壓能幫助紙板讓水留在瓶子里。
Right. What do you conclude, Danny?
對的。丹尼，你得出什么結論？
I conclude that air is stronger than I thought.
我總結出大氣比我想象的要強大。
