他几十年来一直是人权的捍卫者。

He has been a ___champion of human rights for decades.

在他的著作中，他充当个人美德的捍卫者。

In his writings, he acts as a ___champion of personal virtues.

这位律师是环境保护的坚定支持者。

The lawyer is a strong ___champion for environmental protection.