The beauty of mathematics lies in its simplicity and depth.
中国的崛起对自由民主秩序构成了重大挑战。
生活是一系列小戏剧,在更大的戏剧阴影下上演。
痛苦是暂时的,但骄傲是永恒的。
Without food, man can live at most but a few weeks; without it, all other components of social justice are meaningless.