campaign : 通常指在一场大的战争中在某一地区进行的一连串有既定目的的军事行动。也可作引申用。
a bombing campaign
轰炸行动
The allies are intensifying their air campaign.
联军部队正加大他们的空战强度。
struggle : 指激烈或时间持续长的战斗或奋力斗争。
a struggle with an armed robber
和持械劫匪的搏斗
the struggle between good and evil
善恶之争
Clearly there will be a power struggle within the company.
很明显，公司内将出现一场权力之争。