He has set himself up as a crusader for higher press and broadcasting standards.

他成了为取得更高的新闻和广播原则而奋战的斗士。

《柯林斯英汉双解大词典》

Be a crusader.

做一个改革者。

youdao

Give it up! You are no match for a Crusader army.

放弃吧！你根本就不是十字军的对手。摧毁建筑。

youdao

Richard Pipes,a leading authority on Russia and a former anti-Soviet crusader who served in the Reagan administration, also stresses Mr.Gorbachev's pivotal role.

VOA: standard.2009.11.03

Or hit the party-filled port city of Bodrum, where cruise ships dock near a Crusader castle.

BBC: An epic ancient ruins road trip

He is a crusader against a defeatist mentality, but admits the company has lost credibility.

FORBES: Japan's Samurai CEOs (1) Panasonic's Tsuga Kazuhiro

Mr Saakashvili made his name as a crusader for honest government and against nepotism.

ECONOMIST: A worm in the bud of the rose revolution?