我叫无理数，和我的同胞兄弟有理数一样，是由数组成的家族．我的诞生应归功于古希腊的毕达哥拉斯学派，他们发现有些数，例如正方形对角线与其一边之比不能表示为两个整数之比，即不是有理数．本家族族规森严，备有法镜三面，叫做“无限”、“不循环”、“小数”，以此来鉴别 My name is irrational. Like my brother’s rational number, it is a family of numbers. My birth was due to the Pythagorean school of ancient Greece. They found that some numbers, such as the ratio of the square diagonal to its side, cannot be expressed as a ratio of two integers, that is, not rational numbers. This family is closely guarded and has three sides of the mirror. It is called “infinity”, “non-circular” and “decimal” to identify