The very existence of libraries affords the best evidence that we may yet have hope for the future of man.
谷物种植的成功不仅仅以蒲式耳衡量,还要看我们土壤的健康状况。
攻击我很厉害我也回敬得很厉害,攻击我很轻微我也回敬得很轻微。 
The only thing we have to fear is fear itself.