黑洞不仅仅是破坏性的怪物，它们在塑造星系中起着关键作用。

"Freedom is nothing but a chance to be better."

A wise man said， “Before you speak， let your words pass through three gates. At the first gate， ask yourself， “Is it true？” At the second gate ask， “Is it necessary？” At the third gate ask， “Is it kind？”

The problem of the modern individual is not that he has too little choice, but that he has too much.