Pi Day
美音、自然拼读、分级阅读与词汇复习
Table of Contents Introduction.
导言表。
4 What Is Pi?
4号是什么?
5 A Day to Celebrate—Pi Day!
5日庆祝-派!
12 How Do People Celebrate Pi Day?
12 人们如何庆祝皮日?
14 Glossary.
14 词汇表。
16 Introduction What’s your favorite kind of pie?
导言 你最喜欢的馅饼是什么?
Apple?
苹果吗?
Pumpkin?
南瓜吗?
Lemon cream?
柠檬奶油?
If you’re a mathematician or someone who uses math in your work, it might be something very different.
如果你是一个数学家或者在你的作品中使用数学的人,那就可能与众不同。
Pi sounds just like pie, but it’s the name of a special number that allows people around the world to do many interesting things.
Pi听起来就像馅饼,
Math Minute Use pi (3.
数学分钟 使用 pi (3.
14) to find the circumference of a circle.
14)寻找一圈的圆相.
The formula is: circumference = pi × diameter.
其配方为: 环形=皮×直径.
If the diameter of a circle is 2 inches, what is its circumference?
如果一个圆圈的直径是2英寸,那么它的圆圈是什么?
Math Minute To prove pi, take a soup can, a piece of string, and a marker or pen.
数学分钟 为了证明派,取一汤罐,一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一取一
1 Wrap the string around the outside of the can and cut it so the ends just touch.
1个 把绳子绕到罐子的外侧 把它切开 端口就碰了
Then place the end of the string at the edge of the can and stretch it across.
然后把绳子的末端放入罐子的边缘并伸展出.
where the string touches the other side of the can.
弦会触碰罐子的另一边
Measure the diameter again, starting at the new mark.
再次测量直径, 从新标记开始 。
Keep doing that until you have three marks noting the diameter.
继续做,直到你有三个标记注意到直径。
mark.
标记。
That’s pi!
这是皮!
What Is Pi?
皮是什麽?
The idea of pi was discovered more than two thousand years ago by a Greek mathematician named Archimedes (ark-uh- MEE-deez).
pi这个概念由二千多年前一位叫Archimedes(ark-uh-MEE-deez)的希腊数学家所发现.
He was experimenting with shapes and discovered something strange.
他用外形实验,发现了一些奇怪的东西.
He measured the length around a circle, called the circumference.
他测量了一圈周长,称为"环".
Then he measured the distance across the circle from one side to the other through the middle, called the diameter.
然后他测量出从一面到一面的圆相之间的距离,从中间穿过,称为直径.
When he divided the circumference by the diameter, he got the same number every time.
当他用直径来分周而复始时,他每次都得到同样的数字.
It didn’t matter what size the circle was.
这个圈子的大小并不重要。
In 1706, a math teacher in England named William Jones was the first to call this special number pi.
1706年,英国一位叫威廉·琼斯(William Jones)的数学教师首先称这个特殊的号码为pi.
It is the name of the Greek letter π.
其名称取自希腊字母 。
Now all mathematicians and teachers use that symbol when they talk about pi.
现在所有数学家和老师在谈论派时都会使用这个符号.
William Jones taught math on navy ships and in coffeehouses.
威廉·琼斯在海军舰艇和咖啡馆教授数学.
Answer: 6.
答复:6.
28 inches 2 inches?
28英寸2英寸吗?
The value of pi is often given as 3.
Pi的值常被给出为3.
14 (three point one four), but that is just an approximate value.
14(三点一四),但这只是一个大致值.
The numbers to the right of the decimal point actually go on forever.
小数点右侧的数字实际上一直持续到底。
No matter how you calculate it, there are more digits to find.
不管你怎么计算 都能找到更多的数字
In fact, computers have calculated pi to at least eight quadrillion digits to the right of the decimal point.
事实上,计算机计算出pi到小数点右边至少有8个四分位数。
If you tried to write down all those numbers of pi, you’ d use enough paper to go around Earth over a million times!
如果你想记下所有这些Pi的数字,
There would still be no end in sight!
仍无所止也!
What can we do with the number pi?
我们该怎么处理那个号码?
It comes from the shape of a circle and has lots of uses.
其出自一圆形并有很多用途.
One use is to figure out the area of a circle.
一个用途是找出一个圆圈的面积.
Area is the amount of space inside something that is flat.
面积是平地的空间。
Landscapers use pi to figure out how much area a lawn sprinkler can cover.
风景名胜区使用pi来计算出一个草地喷洒机能覆盖多少面积.
That amount tells them how many sprinklers they need in order to water a lawn evenly.
这个数字告诉他们,为了平均地给草坪取水,需要多少喷洒器。
Agricultural sprinklers use long pipes on wheels to irrigate crops evenly.
农业喷洒机在轮子上使用长管来平均灌溉农作物.
This student wrote out pi to 1,120 places.
这个学生给1,120个地方写了Pi.
Wowser!
哗!
The world record for memorizing pi is held by Chao Lu from China.
缅怀派的世界纪录由来自中国的"花花公子"(Chao Lu)所持有.
Chao recited pi from memory to 67,890 places in November 2006.
2006年11月,Chao将pi从记忆诵读到67,890所.
Marc Umile set a United States record in late 2006 by memorizing 12,887 digits of pi.
马克·乌米莱于2006年末通过纪念12,887位pii数字设定了美国纪录.
The next year, he broke his own record by repeating 15,314 digits of pi.
翌年,他又重复了15,314位Pi的数字,打破了自己的纪录.
Pi can also be used to figure out the volume of something shaped like a ball or a tube.
Pi也可以用来计算出形状为球或管等物体的体积.
Volume is the amount of space inside something that is three-dimensional.
音量是三维事物内部的空间量.
Farmers use pi to discover the volume of grain that will fit in a silo for storage.
农民利用pi来发现能放入仓储的谷物量.
That number helps farmers know if they have enough grain to feed their animals.
这个数字帮助农民知道他们是否有足够的粮食来养活他们的动物.
Pi also helps people do other kinds of math and science.
皮还帮助人们做其他种类的数学和科学.
Airline pilots use pi to figure out how much fuel they need to carry on their flights.
航空飞行员使用pi来判断飞行需要携带多少燃料.
Astronomers use pi to look for planets outside our solar system.
天文学家利用Pi寻找太阳系外的行星.
They also use pi to determine what the universe looks like.
他们也使用pi来确定宇宙的外观.
Galaxy Messier 81 was first discovered by Johann Elert Bode in 1774.
Galaxy Messier 81由约翰·埃尔特·博德于1774年首次发现.
Chao Lu (left) receives his award for reciting pi.
车鲁(左)以"诵皮"获其奖.
Do You Know?
你知道吗?
Albert Einstein was born on March 14, 1879—Pi Day!
阿尔伯特·爱因斯坦生于1879年3月14日——皮日!
Computers often need to generate random, or unpredictable, numbers.
计算机往往需要生成随机或无法预测的数字.
But computers can never create truly random numbers on their own.
但是计算机永远无法自己创造出真正的随机数字.
Instead, they use pi to help them come up with numbers that seem random to the user.
相反,他们使用pi来帮助他们提出用户看来是随机的数字.
Whenever you play a computer game that is partly based on luck, the computer is probably using pi to “roll the dice.”
每当你玩电脑游戏时, “
A Day to Celebrate—Pi Day!
庆祝一日——皮日!
Mathematicians and other people around the world celebrate March 14 as Pi Day.
数学家和世界各地的其他人将3月14日庆祝为"皮日".
They chose March 14 because of the way dates are written in the United States.
他们选择3月14日是因为日期在美国的写作方式.
The number for the month comes first, then the day, then the year.
月之数先出而后出而后出也.
Since March is the third month, we can write March 14 as 3-14, the first three digits of pi!
由于3月是第三个月,我们可以将3月14日写成3-14,Pi的头三位数!
Some people like to start their celebration of Pi Day at 1:59 pm and 26 seconds.
有些人喜欢在下午1点59分26秒开始庆祝皮日.
This marks the first eight digits of pi—3.
这标志着Pi -3的前八个数字。
And once in each century, there’s a special Pi Day—3-14-15.
每个世纪都有一个特殊的 皮日-3-14-15 (英语).
On that Pi Day, people can get “extra credit” for starting the celebration at 9:26 am and 53 seconds.
在Pi日,人们可以在上午9:26和53秒开始庆祝活动时获得“额外功劳”。
This time adds two more digits to the celebration string— 3.
这一次在庆祝弦上又增加了两个数字—— 3 (中文(简体) ).
Whew!
呜!
In 2009, the U.
2009年,乌.
S.
师曰.
Congress voted to make March 14 National Pi Day.
国会投票决定把3月14日定为"全国皮日".
One representative who voted for it said he hoped students would “discover that they really do like math and they really do like science.”
一名投票赞成的代表说,他希望学生“发现他们确实喜欢数学,而且他们确实喜欢科学。 “
How Do People Celebrate Pi Day?
人们如何庆祝皮日?
The first Pi Day was celebrated in 1988.
1988年庆祝了第一个皮日.
An American scientist named Larry Shaw arranged for a huge celebration at the San Francisco Exploratorium.
一位名叫拉里·肖(Larry Shaw)的美国科学家安排了在旧金山探险馆举行的一场盛大的庆祝活动.
People marched around a circular room, sang songs, and ate pie.
人们绕着一个圆形房间行走,唱起歌来,吃起派来.
News stories about the celebration spread the idea to schools, museums, and communities.
有关庆祝活动的新闻将这个想法传播到学校、博物馆和社区。
Eventually, Pi Day events were held all over the world.
最终 皮日活动在世界各地举行.
Many people celebrate Pi Day with family and friends.
很多人庆祝 皮日与亲友.
The most popular way to celebrate is by eating pi-themed foods.
最受欢迎的庆祝方式是吃以pi为主题的食物.
Many people make pizzas (round ones, of course) and bake fruit or cream pies.
许多人会做披萨(当然是圆饼)并烤出水果或奶油派.
Some people even use a special pie pan shaped like the Greek letter π.
有些人甚至使用像希腊字母所塑造的特殊馅饼锅.
Those who are willing to go one step further drink pi-neapple juice, too.
愿意再往前走一步的人 也会喝起苹果汁
If all that food is too sweet, there are always dinner foods such as shepherd’s pie and chicken potpie.
如果这些食物都太甜了,
In 1988, Shaw led the parade, followed by people carrying the numbers of pi.
1988年,肖带领阅兵,后由携带派数的人接来.
In 2010, elementary school students in Florida made a pi chain with 5,904 links.
2010年,佛罗里达州小学生制作有5,904个链接的皮链.
After all that eating, some people work off their food by walking or running a pi marathon.
吃过这么多饭后,有些人用走行走或跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑跑
These runs have distances of 3.
这些跑道的距离为 3.
14 miles (5.
14英里(5.
05 km) or 3.
05公里)或为3.
14 kilometers (1.
14公里 一、导 言
95 mi.)
95分钟)
Walking or running in a circle is also an option.
在一圈中行走或跑步也是一个选项.
Other people celebrate by decorating their rooms or themselves with pi-themed objects.
其他人通过装饰房间来庆祝,或者用Pi主题物体来庆祝自己.
They cut out the shape of π and put it on walls and tables.
他们切出""的外形并放入墙上和桌子上.
Some people wear T-shirts with π on them or π-shaped jewelry.
有些人穿着T恤,上面有 或 形珠宝.
Mathematicians celebrate the number pi because it is useful and important for many mathematical and scientific projects.
数学家们庆祝"数字派",因为它对于许多数学和科学项目都是有用而重要的.
The rest of us can celebrate Pi Day, too.
余等亦能庆彼日.
It helps us remember that science can be fun as well as useful.
它帮助我们记住 科学既有趣又有用
Glossary area (n.)
词汇领域(不详)
the amount of space that could cover the surface of a shape or region as measured in square units (p.
以平方单位计量的可覆盖形状或区域表面的空间量(p.
8) calculate (v.)
8)计算(五.
to work out or estimate an answer using mathematics (p.
用数学来制定或估计答案(p.
7) circumference the distance around the outside (n.)
7) 环绕外侧的距离 (n.
of a circle (p.
圆形(p.
5) decimal point the dot in a number such as 1.
5) 小数点在数字中如 1.
47 (n.)
47(不详)
that indicates that the numbers to the right of it are tenths, hundredths, and so on (p.
表示其右下方的数字为十分之一,百分之一等(p.
7) diameter (n.)
7)直径(n.
the length of a straight line drawn through the center of a circle or a sphere from one side to the other (p.
从一面到一面的圆心或球体所绘制的直线长度(p.
5) digits (n.)
5) 数字 (n.
the numerals from 0 to 9 that can be used to write any number (p.
用于写出任意数字的从0到9的数字(p.
7) divided (v.)
7)除(五.
worked out a number by the process of division, in math; found how many times one number went into another number (p.
在数学中,通过划分过程计算出一个数字;发现一个数字到另一个数字(p.
5) pi (n.)
5）圆周率（名词）
a constant value that represents the ratio between the circumference and diameter of a circle (p.
一个常数,代表一个圆周与直径之比(p.
4) volume (n.)
4) 卷 (n.
the amount of space that something takes up as measured in cubic units (p.
以立方单位计量的空间(p.
9) Some people like pi so much that they wear it.
9) 一些人喜欢Pi,所以穿着.