失去一个父母可以看成是一种不幸；失去双亲看上去就像是一种粗心了。
The past is never dead; it's not even past. This is especially true in detective fiction.
Continuous improvement isn't a destination—it's a journey that never ends.
Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.
We are all different, but we share the same human spirit. Perhaps it's human nature that we adapt and survive.
科学是一个微分方程。宗教是一个边界条件。
对于非礼的事，上等到的士人根本不想；对于非礼的事，中等的士人从来不说；对于非礼的事，下等的士人紧闭门户。