边境部队击退了敌人的突然入侵。

Border forces repelled the enemy's sudden ___incursion.

蚊子的入侵扰乱了露营地的安宁。

The ___incursion of mosquitoes ruined the peace at the campsite.

公司对竞争对手近期侵入我们的市场领域表示强烈反对。

The company strongly objected to the competitor's recent ___incursion into our market territory.