n.入侵者;干扰者;妨碍者
The intruder whipped out a knife (from his pocket). 闯进来的人突然(从他的衣袋里)掏出一把刀来。
We hid behind the bushes, ready to pounce on the intruder. 我们藏在灌木丛后,准备向来犯者发起突然袭击。
I hate intruders when I am studying. 在我学习时我讨厌有人打扰我。