campaign
词根词缀：
camp n. 营地（营地一般都在野外）
campaign n. 活动；战役
camp 田野 + aign → 营地 → 战役
campus n. 校园
camp 田野 + us 表名词，用于科学术语 → 校园
encamp v. 宿营
en 进入…之中 + camp 营地 → 宿营
数据来源：新东方英语词汇速记大全
相关例句：
Napoleon's army was sacrificed on the altar of folly in the disastrous Russian campaign.
在灾难性的俄国战役中，拿破仑的军队成了这一愚蠢之举的牺牲品。
Just as the presidential campaign was picking up steam, riots exploded in Los Angeles.
正当总统竞选活动的声势日益壮大时，洛杉矶爆发了暴乱。
The government has launched a campaign of television commercials and leaflets.
政府通过电视广告和传单的形式发起了宣传活动。
The campaign to wipe out illiteracy launched out with great vigour.
扫盲运动生气勃勃地展开了。
He brought up a subject rarely raised during the course of this campaign
他提出了一个在这次运动中很少被提及的话题。
He's demonstrated how a campaign based on domestic issues can move votes.
他已证明了基于国内议题的竞选活动是可以拉到选票的。