Language is not just a system of symbols， but a set of practices with social and cultural significance.
语言不仅仅是符号系统，还是具有社会和文化重要性的一组实践。
Diversity in fruit varieties is like diversity in cultures - both make the world richer and more interesting.
你永远无法如你所愿那般彻底了解一个人。
数学之美在于它能够将复杂的事物简化。