我是一个美国黑人，我为我的种族感到骄傲。我为自己是谁感到骄傲。我有许多自豪和尊严。

"Don't let yesterday take up too much of today."

释义：每个人应该先处理好自己的事情，不要去过多干涉别人的事情。

The deepest theorems often arise from the simplest observations.

"Science is not just a collection of facts; it's a way of thinking, a way of skeptically interrogating the universe with a fine understanding of human fallibility."

Quality should never be compromised, no matter the cost.