This is the 915th most frequent Chinese word.
阻击战
A "blocking battle" or a "defensive battle to resist an attack."
In this context, 阻击战 indicates a military tactic, specifically a strategically planned engagement designed to delay or halt the movement of an advancing force.
军队在敌人的前进路线部署了阻击战，成功延缓了敌方的进攻。
The army set up a defensive battle on the enemy's advancement route, successfully delaying the enemy's attack.
阻击战, in this sentence, is used metaphorically to signify a strategic opposition or competition effort, emphasizing the intensity and tactical characteristics of the encounter.
在经济竞争中，小公司与大企业展开了一场市场份额的阻击战。
In economic competition, small companies launched a market share contention battle against large corporations.
阻击战 is used here to metaphorically describe an organized effort, often of a defensive and preventive nature, to stop or halt the progress or spread of something.