The power of mathematics lies in its generality and abstraction.

中层管理者是企业变革的无名英雄。

The downside of my celebrity is that I cannot go anywhere in the world without being recognised. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away.

国君自以为神圣聪明，而不去咨询官吏，自以为国家安定强大，而不注重防守，周围的邻国图谋侵略他却不知道戒备。