刀钝石来磨,人蠢没奈何的英文

A blunt knife may be sharpened on a stone,but if a man is stupid,there is no help for his stupidity.

• 刀:    knife; sword
• 钝:    blunt; dull
• 石:    dan,a unit of dry ...
• 来:    come; arrive
• 磨:    mill; millstones
• 人:    human being; man; ...
• 蠢:    wriggle
• 没奈何:    be utterly helples ...