十1. a series of actions advancing a principle or tending toward a particular end
同義詞：campaign, cause, drive, movement, effort
2. any of the more or less continuous military expeditions in the 11th to 13th centuries when Christian powers of Europe tried to recapture the Holy Land from the Muslims
動詞crusade:
1. exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for
同義詞：fight, press, campaign, push, agitate
2. go on a crusade; fight a holy war
- 習慣用語
- crusade against 討伐; 參加反對...的活動
- crusade for 為...而征戰, 參加支持...的活動
- in favour of 為...而征戰, 參加支持...的活動
