When public speaking， pause frequently. Pause before you say something in a new way， pause after you have said something you believe is important， and pause as a relief to let listeners absorb details.

记忆就像一个幽灵，或者像一个背叛你的朋友。

The concept of truth is inseparable from the concept of freedom.

数学的统一性不是强加的，而是被发现的。

一家采矿公司的真正价值在于其平衡利润与环境管理的能力。