The sun must set to rise.
太阳必须落下才能升起。
I never set out to be famous. I just wanted to play music.
The greatest stories are those that reveal the human condition.
成功不在于完美，而在于持续改进和适应变化。
The quest to unify the fundamental forces of nature is one of the greatest challenges in modern physics.
A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.
安全困境是国际政治的一个基本特征，因为国家增加自身安全的努力往往会降低其他国家的安全。
繁荣建立在五个支柱上：积极情绪、投入、人际关系、意义和成就。
谁不付出就什么都得不到，最大的不幸不是没人爱，而是没有人去爱。