The square root of5is a surd .

5的平方根是不尽根。

Although modern science and technology have proved that such methods are ab surd , there are still millions of people use such methods in many remote places nowadays .

尽管现代科学技术已经证明了这些方法是愚昧的，然而在许多偏僻的地方，仍有成千上。