欠考虑的一句话比打一拳更伤人。 大虾帮忙翻译英文下,谢谢啦!

这样翻译更合乎老外的表达习惯,而且简洁:
A thoughtless word can hurt more than a blow.

An unconsidered word is more harmful to people than boxing.

A statement without consideration hurts a person more than a punch does.