你的生日在圆周率第几位？

前几天忘记发这个话题了哈哈，假装今天是3月14日圆周率日。你的生日在圆周率第几位？

查询方法：直接在本微信公众号后台发送你的生日日期8位数字就可以查询。注意，是微信公众号，不是视频号。查询需要点时间，请耐心等待。

今天你练听力了吗？

🤔️小作业：

1. What can be inferred about the celebration of Pi Day from the article?

A. It was initially intended to be a serious academic conference.

B. Its activities are designed to mirror the mathematical properties of pi.

C. It has evolved from a local event into an international phenomenon.

D. Its popularity is mainly due to the involvement of famous scientists.

无注释原文：

The Story Behind Pi Day

From: Mathnasium

Every year on March 14, math lovers around the world celebrate Pi Day. At first glance it may seem like just another fun day for numbers, but this special date actually celebrates one of the most fascinating and important numbers in mathematics.

The date March 14 is written as 3.14, which matches the first three digits of the mathematical constant known as π, or pi. This number represents the relationship between the circumference of a circle and its diameter. No matter how large or small a circle is, this relationship always stays the same. This simple idea connects circles of every size across the universe.

This means that if you take the circumference of any circle and divide it by its diameter, the result will always be the same number, pi. While we often round it to 3.14, the digits of pi actually continue forever without repeating. Mathematicians have calculated trillions of digits of pi, yet the number never ends.

The story of pi goes back thousands of years. Ancient civilizations were already curious about circles and their measurements. Early mathematicians in places like Egypt and Babylon tried to estimate the value of pi using basic geometry. Later, the Greek mathematician Archimedes developed one of the earliest accurate methods for calculating pi by using polygons inside and outside a circle. His work helped people understand that the value of pi could be calculated more precisely with careful reasoning.

The modern celebration of Pi Day began much later. In 1988, physicist Larry Shaw organized the first Pi Day celebration at the Exploratorium science museum in San Francisco. People celebrated by walking in circles and eating pie, a playful nod to the name of the number. The idea quickly spread among schools, teachers, and math enthusiasts. Over time, Pi Day became a global celebration of curiosity, learning, and the joy of mathematics.

Pi appears in far more places than many people realize. It is essential for calculating the area of a circle, understanding waves, studying engineering structures, and even exploring space. Scientists use pi when working with satellites, designing buildings, and analyzing patterns in nature. From the shape of planets to the motion of sound waves, pi quietly plays a role in many parts of the world around us.

Pi Day is also a great reminder that math is not just about solving problems on paper. It is about discovering patterns, asking questions, and exploring how the universe works. A single number like pi can connect geometry, science, and real life in surprising ways.

For students, Pi Day is a chance to see math from a different perspective. Instead of thinking about numbers as something difficult, it becomes a fun challenge to explore, memorize digits of pi, measure circles, or discover where math appears in everyday life.

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注：完整题目见本文开头；中文文本为机器翻译，仅供参考

含注释全文：

The Story Behind Pi Day

From: Mathnasium

Every year on March 14, math lovers around the world celebrate Pi Day. At first glance it may seem like just another fun day for numbers, but this special date actually celebrates one of the most fascinating and important numbers in mathematics.

每年的3月14日，全球的数学爱好者都会庆祝圆周率日。乍看之下，这似乎只是又一个与数字相关的趣味节日，但这个特殊的日子，其实是在向数学中最迷人、最重要的常数之一致敬。

glance /ɡlɑːns/ 可以作名词，也可以作动词，表示“一瞥，看一眼；扫视”，英文解释为“to quickly look at someone or something”举个🌰：She took/cast a glance at her watch. 她看了一下手表。The man glanced nervously at his watch. 那人紧张地看了一眼手表。

fascinating /ˈfæs.ən.eɪ.tɪŋ/ 表示“极有趣的；吸引人的”，英文解释为“extremely interesting”举个🌰：I found the whole movie fascinating. 我觉得整部电影都很吸引人。

The date March 14 is written as 3.14, which matches the first three digits of the mathematical constant known as π, or pi. This number represents the relationship between the circumference of a circle and its diameter. No matter how large or small a circle is, this relationship always stays the same. This simple idea connects circles of every size across the universe.

3月14日这个日期写作3.14，恰好对应了数学常数π（pi）的前三位数字。π代表的是圆的周长与直径之间的比例关系。无论圆是大是小，这个比例关系都恒定不变。正是这个简单的概念，将宇宙中所有尺度的圆联系在了一起。

constant /ˈkɒn.stənt/ 作名词，熟词僻义，表示“常数；常量”，英文解释为“a number or quantity that does not vary”

补充：

📍variable表示“可变情况；变量；可变因素”（a situation, number or quantity that can vary or be varied）。

circumference /səˈkʌmfərəns/ 表示“圆周；圆周长”，英文解释为“a line that goes around a circle or any other curved shape; the length of this line”举个🌰：The earth is almost 25 000 miles in circumference. 地球的周长大约为25000英里。

表示“直径；对径”，英文解释为“a straight line going from one side of a circle or any other round object to the other side, passing through the centre”举个🌰：The dome is 42.3 metres in diameter. 这个穹顶直径为42.3米。

补充：

📍radius：a straight line between the centre of a circle and any point on its outer edge; the length of this line 半径（长度）

This means that if you take the circumference of any circle and divide it by its diameter, the result will always be the same number, pi. While we often round it to 3.14, the digits of pi actually continue forever without repeating. Mathematicians have calculated trillions of digits of pi, yet the number never ends.

也就是说，任何一个圆的周长除以它的直径，得到的结果总是π。我们通常把它近似为3.14，但实际上π是一个无限不循环小数。数学家们已经计算出了π的数万亿位小数，但它仍然没有尽头。

The story of pi goes back thousands of years. Ancient civilizations were already curious about circles and their measurements. Early mathematicians in places like Egypt and Babylon tried to estimate the value of pi using basic geometry. Later, the Greek mathematician Archimedes developed one of the earliest accurate methods for calculating pi by using polygons inside and outside a circle. His work helped people understand that the value of pi could be calculated more precisely with careful reasoning.

π的故事可以追溯到几千年前。古代文明就已经对圆形及其度量充满好奇。在埃及和巴比伦等地，早期的数学家们尝试用基础的几何方法来估算π的值。后来，希腊数学家阿基米德（Archimedes）通过计算圆的内接和外切多边形，开创了最早精确计算π的方法之一。他的工作让人们认识到，通过严谨的推理可以更精确地逼近π的值。

geometry /dʒiˈɒm.ə.tri/ 表示“几何学”，英文解释为“the area of mathematics relating to the study of space and the relationships between points, lines, curves, and surfaces”如：the laws of geometry 几何定律。

polygon /ˈpɒl.i.ɡɒn/ 表示“多边形”，英文解释为“a flat shape with three or more straight sides”举个🌰：Triangles and squares are polygons. 三角形和正方形是多边形。

The modern celebration of Pi Day began much later. In 1988, physicist Larry Shaw organized the first Pi Day celebration at the Exploratorium science museum in San Francisco. People celebrated by walking in circles and eating pie, a playful nod to the name of the number. The idea quickly spread among schools, teachers, and math enthusiasts. Over time, Pi Day became a global celebration of curiosity, learning, and the joy of mathematics.

现代圆周率日的庆祝活动则开始得晚得多。1988年，物理学家拉里·肖（Larry Shaw）在旧金山的探索馆科学博物馆组织了首次圆周率日庆祝活动。人们通过绕圈行走和吃馅饼（英文中“馅饼”pie与π同音）来庆祝，巧妙地呼应了这个数字的名字。这个创意迅速在学校、教师和数学爱好者中传播开来。久而久之，圆周率日演变成了一个全球性的节日，旨在庆祝好奇心、学习和数学带来的乐趣。

nod /nɒd/ 作动词，表示“点头；（尤指）点头赞同，点头致意，点头示意”，英文解释为“to move your head down and then up, sometimes several times, especially to show agreement, approval, or greeting, or to show something by doing this”举个🌰：Many people in the audience nodded in agreement. 许多听众点头表示赞同。

📍a nod to sth表示向某事物致敬、表示认可或受到启发，通常指在某种程度上模仿、回应或提到某个事物，通常是为了表达某种敬意或延续某个传统。

Pi appears in far more places than many people realize. It is essential for calculating the area of a circle, understanding waves, studying engineering structures, and even exploring space. Scientists use pi when working with satellites, designing buildings, and analyzing patterns in nature. From the shape of planets to the motion of sound waves, pi quietly plays a role in many parts of the world around us.

π的应用范围远比许多人想象的要广泛。它对于计算圆的面积、理解波动、研究工程结构乃至探索太空都至关重要。科学家们在处理卫星数据、设计建筑和分析自然界的模式时，都会用到π。从行星的形状到声波的运动，π在我们周围世界的许多方面都默默地扮演着关键角色。

motion /ˈməʊ.ʃən/ 1）表示“（会议中正式提出准备表决的）提议，动议”，英文解释为“a formal suggestion made, discussed, and voted on at a meeting”举个🌰：Someone proposed a motion to increase the membership fee to $500 a year. 有人提议将年会费增加至500美元。

2）表示“动；运动；移动”，英文解释为“the act or process of moving, or a particular action or movement”举个🌰：The violent motion of the ship upset his stomach. 船的剧烈摇晃使他的胃很不舒服。

Pi Day is also a great reminder that math is not just about solving problems on paper. It is about discovering patterns, asking questions, and exploring how the universe works. A single number like pi can connect geometry, science, and real life in surprising ways.

圆周率日也很好地提醒我们，数学不仅仅是解决纸上的习题。它关乎发现规律、提出问题，并探索宇宙的运行方式。像π这样一个简单的数字，就能以令人惊叹的方式，将几何学、科学和现实生活紧密联系起来。

For students, Pi Day is a chance to see math from a different perspective. Instead of thinking about numbers as something difficult, it becomes a fun challenge to explore, memorize digits of pi, measure circles, or discover where math appears in everyday life.

对学生而言，圆周率日提供了一个从全新视角看待数学的机会。它让数学不再只是令人头疼的数字，而是变成了有趣的探索挑战：比如背诵π的小数位、测量圆形，或者发现数学在日常生活中的身影。

perspective /pəˈspek.tɪv/ 表示“（思考问题的）角度，观点，想法”，英文解释为“a particular way of considering something”举个🌰：Her attitude lends a fresh perspective to the subject. 她的态度为这一问题提供了新的视角。

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