Episode Details

Math lovers celebrate Pi Day on March 14, or 3/14. Around the world, many people even mark the day by eating a tasty piece of pie. 

数学爱好者会在 3 月 14 日（即 3 月 14 日）庆祝圆周率日。 在世界各地，许多人甚至通过吃一块美味的馅饼来纪念这一天。 

For those who do not know, pi is a mathematical constant, a value that never changes. It expresses the ratio of a circle’s circumference (the distance around the circle) to its diameter (the distance across the circle, passing through its center.) 

对于那些不知道的人来说，圆周率是一个数学常数，一个永远不会改变的值。 它表示圆的周长（围绕圆的距离）与其直径（穿过圆的距离，穿过圆心的距离）的比率。 

The approximate value of this mathematical constant is 3.1415926535. But those are just the first 10 digits of pi. The numbers go on infinitely, or forever. 

该数学常数的近似值为3.1415926535。 但这些只是 pi 的前 10 位数字。 这些数字无限地持续下去，或者永远持续下去。 

Pi can calculate the circumference of a circle by measuring the diameter and multiplying that by the 3.14-plus number. The formula has been used in physics, astronomy, engineering and other fields, dating back thousands of years. 

Pi 可以通过测量直径并将其乘以 3.14+ 的数字来计算圆的周长。 该公式已被应用于物理学、天文学、工程学等领域，其历史可以追溯到数千年前。 

Long before computers, scientists such as Isaac Newton spent many hours calculating decimal places by hand. But today, researchers use computers to come up with trillions of digits for pi. But there is no end. 

早在计算机出现之前，艾萨克·牛顿等科学家就花了很多时间手工计算小数位。 但今天，研究人员使用计算机计算出数万亿位的圆周率。 但没有尽头。

There are many uses for pi. 

pi 有很多用途。 

The number helps calculate the size of paper rolls used in printers. And it helps decide the necessary size of a container that serves heating and air co