1·It's also an irrational number, with an infinite number of decimal places and can't be written as a ratio of two whole Numbers.
pai也是个无理数，它的小数位有无限多，而且pai无法写成了两个整数的比值。
2·Is an irrational number, also is a transcendental number.
是一个无理数，也是一个超越数。
3·The square root of two is an irrational number.
二的平方根是一个无理数。
4·The rotating number is generally an irrational number and only in some special conditions is a rational one, from which it can be known that the motion of the system is quasi-periodic or periodic.
在此基础上分析系统的转动数，发现转动数一般为无理数，只在某些特定条件下存在有理旋转数，从而系统作准周期运动或者周期运动。
5·Amazingly, this works for any piece size, even if the cutting Angle is an irrational number: all the icing will be back on top after a finite number of steps.
令人惊奇的是，对于任意大小的扇形，即使圆心角是一个无理数：经过有限步之后，所有的糖衣都会回到上面。