没有人规定你必须永远快乐。
"There's nothing that says you have to be happy all the time."
Greatness is not about being the best. It's about being better than you were before.
预测未来的最好方法是创造未来。
翻译:探索深奥的道理,揭示隐微的事理,钩取深处的义理,使人获得深远的教益。
The possibility of finding a planet similar to Earth is what drives our passion for exoplanet research.