The quest to unify the fundamental forces of nature is one of the greatest challenges in modern physics.
统一自然界基本力的追求是现代物理学中最大的挑战之一。
真相很少是纯粹的,也从不简单。
The theory of Communism may be summed up in one sentence: Abolish all private property.
The first fruit of this imagination - and the first lesson of the social science that embodies it - is the idea that the individual can understand his own experience and gauge his own fate only by locating himself within his period, that he can know his own chances in life only by becoming aware of those of all individuals in his circumstances.
太阳初升时也是微弱的,随着时间推移才逐渐积聚力量和勇气。