巨人倒下时，身体还是暖的。
"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful."
The world changes when you change.
There is no friend as loyal as a book.
The Sun always has ways to reach us wherever we are.
"The truth is rarely pure and never simple."
黑洞不仅仅是宇宙的真空吸尘器；它们是测试我们物理理论极限的终极实验室。
The cosmos is also within us, we're made of star-stuff. We are a way for the cosmos, to know itself.