统一自然界所有力的挑战是几十年来推动理论物理学发展的动力之一。
Sometimes the simplest melodies carry the deepest emotions.
Reality is a question of perspective; the further you get from the past, the more concrete and plausible it seems—but as you approach the present, it inevitably seems more and more incredible.
The soul of a nation lives in its language.
