他在陈氏定理上的工作对证明哥德巴赫猜想取得了重要进展。

His work on Chen's Theorem made an important advance towards proving Goldbach's Conjecture.

民间文学艺术是世界各民族的文化瑰宝，然而，对民间文学艺术的法律保护犹如法学领域的“哥德巴赫猜想”。

Folklores are cultural treasures to the people of the world. Nevertheless, the protection thereof is just like the Goldbach's conjecture in the legal field.