crusade

1. N-COUNT A crusade is a long and determined attempt to achieve something for a cause that you feel strongly about. (长期而坚定的) 努力奋斗

He made it his crusade to teach children to love books. 他把教育孩子热爱书籍作为自己的奋斗目标。

2. V-I If you crusade for a particular cause, you make a long and determined effort to achieve something for it. (为推进某一事业而) 奋斗

...a newspaper that has crusaded against the country's cocaine traffickers. …一份致力于打击本国可卡因走私犯的报纸。