雅思口语素材：好句推荐-知识投资雅思口语素材：好句推荐-知识投资 　　If a man empties his purse into his head , no man can take it away from him , an investment in knowledge always pays the best interest .
　　倾其所有追求知识，没有人能夺走它;向知识投资，收益较佳。