If there is an incursion into a country, enemy soldiers suddenly enter it.
例句
...armed incursions into border areas by rebel forces.叛军武装入侵边境地区
N-COUNT
涌入;侵入;传入
If someone or something enters an area where you would not expect them to be, or where they have not been found before, you can call this an incursion, especially when you disapprove of their presence.
例句
Traditional crafts remain remarkably unchanged by the slow incursion of modern ways.传统工艺继续保持原有的特色,没有因现代化手段的缓慢引入而改变。...her disastrous incursion into the property market.她非常不明智地转入房地产市场
英汉词典释义
n.
袭击, 侵入, 侵犯
Enemy forces have made incursions into our territory.敌军已入侵我国领土。
英英词典释义
Noun
1. the act of entering some territory or domain (often in large numbers);
"the incursion of television into the American livingroom"