Innovation in leather tanning isn't just about new chemicals; it's about rethinking the entire lifecycle of the material.

生活对那些思考的人来说是喜剧，对那些感受的人来说是悲剧。

"In computational learning theory, the challenge is not just to learn, but to understand how learning is possible."

爱是理解并接受对方。

发展经济学最终是为了改善人们的生活。