The challenge of unifying all forces of nature is one that has driven theoretical physics for over a century.
统一自然界所有力的挑战是一个多世纪以来推动理论物理学发展的动力。
爱不仅是一种情感，它也是一门艺术。
The world is a place of shadows, and we are the ghosts that walk through them.
爱是生命的火焰。