The study of black holes has led us to the edge of our understanding, where the known laws of physics break down and new theories must emerge.
多样性不仅仅是一个流行词;它是商业的必要条件。
I like the night. Without the dark, we'd never see the stars.
Success is not final, failure is not fatal: It is the courage to continue that counts.
Never to suffer would never to have been blessed.