白天鹅不每天沐浴，也是洁白的；黑乌鸦不每天暴晒，也是黑的。

If somebody offers you an amazing opportunity but you are not sure you can do it, say yes – then learn how to do it later!

The mind is a dynamic system of adjustments.

模型检查是验证硬件和软件系统正确性的强大工具。