叶公问孔子于子路，子路不对。子曰：“汝奚不曰：其为人也，发愤忘食，乐以忘忧，不知老之将至云尔？”
叶公问子路：孔子是怎样的人，子路不回答。孔子说：“你怎么不说：他这个人啊，发愤学习就忘记吃饭，高兴起来就忘记了忧愁，不知道快要变老了等等？”
The total speech act comprises both the act of uttering words and the act of meaning.
The future of forestry lies in balancing economic growth with ecological responsibility.
Future competition is about the industrial chain, we must build a complete ecosystem.
"The true power of science lies in its ability to unite us in our quest for knowledge."