incursion

1. N-COUNT If there is an incursion into a country, enemy soldiers suddenly enter it. 侵入[正式] [oft N 'into' n]

...armed incursions into border areas by rebel forces. ...叛軍武裝入侵邊境地區。

2. N-COUNT 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. 侵入[正式] [oft N 'of' n]

...her disastrous incursion into the property market. ...她非常不明智地轉入房地産市場。