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.
The only thing that counts is what cannot be explained.
很可能未来会发明出更多辅助视觉的工具,它们超越现有仪器的程度,就像现有仪器超越肉眼一样。