crusader

名词 crusader:

1. a disputant who advocates reform
   同义词：reformer, reformist, social reformer, meliorist
2. a warrior who engages in a holy war

1. The crusaders fight for their country.
   十字军战士为了祖国而战。
2. The crusader took part in the meeting.
   改革者参加了那次会议。