解析：知道自己还有所不知，这是很高明的。不知道却自以为知道，这就是很糟糕的。
那双曾经属于我的珍贵的手。
The fact is that women have more power and influence in America today than at any other time in our history.
你读得越多，知道的事情就越多。你学得越多，去的地方就越多。
The advancement of mathematics is due to those who are driven not by the desire for application but by the joy of discovery.