Keep your circle small and your dreams big.
Mathematics is a language that allows us to describe the indescribable.
译文:这种无端的愁绪最让人痛苦!不要去倚靠那高高的栏杆,夕阳正缓缓沉落,烟雾笼罩的柳林让人见了肝肠寸断。