例句：

　　He was made professor at the age of 40.

　　他40歲時(shí)成為教授。

　　University professors both teach and undertake research.

　　大學(xué)教授既要教學(xué)又要從事研究工作。

　　The television debate was moderated by a law professor.

　　這場電視辯論由一位法學(xué)教授主持。