They have long been involved in a crusade for racial equality.

长期以来他们一直致力于取种族平等运动。

He has crusaded tirelessly for women’s and gay rights.

他孜孜不倦地为取妇女和同性恋者权利而奋斗。

For 23years he led a crusade for peace.

他领导了一场和平运动23年之久。