讨论犹如砺石，思想好比锋刃，两相砥砺将使思想更加锋利。

The discussion is like stone, thought like blade, two will make thought more sharp temper.

youdao

讨论犹如砺石，思想好比锋刃，两相砥砺将使思想更加锋利。

The discussion is like stone, thought like blade, two will make thought more sharp temper.

youdao