The most sustainable aquaculture operations are those that mimic nature.

Democracy is the worst form of government except for all those other forms that have been tried from time to time.

自守表示的研究是数学知识统一性的反映。

【释义】：当面赞誉他人的人往往不够忠诚，只注重外表修饰的人往往缺乏真情实意。

恐惧和兴趣能激励人。