a person who makes a long and determined effort to achieve something that they believe to be right or to stop something they believe to be wrong synonym campaigner十字军战士;(某)运动的参加者 She was a moral crusader who campaigned on a range of issues. 她过去在一系列问题上大力倡导道德。 - crusader for something
He has set himself up as a crusader for higher standards in the media. 他把自己树立为媒体高标准的斗士。
- often Crusader
a fighter in the Crusades in the Middle Ages 十字军战士;(某)运动的参加者 In 1204 Crusaders captured Constantinople. 1204年,十字军占领了君士坦丁堡。