1. 侵扰;打扰
    If you say that someone is intruding into a particular place or situation, you mean that they are not wanted or welcome there.

    e.g. The press has been blamed for intruding into people's personal lives in an unacceptable way...
           新闻媒体因为以令人难以容忍的方式侵扰人们的私生活而一直受到指责。
    e.g. I don't want to intrude on your meeting...
           我不想打扰你们的会议。

2. 干扰;扰乱
    If something intrudes on your mood or your life, it disturbs it or has an unwanted effect on it.

    e.g. Do you feel anxious when unforeseen incidents intrude on your day?...
           当意外事件干扰了你的生活时,你会感到焦虑吗？
    e.g. There are times when personal feelings cannot be allowed to intrude.
           有些时候是不允许夹杂个人感情的。

3. 侵入;闯入
    If someone intrudes into a place, they go there even though they are not allowed to be there.

    e.g. The officer on the scene said no one had intruded into the area.
           在场的警官说没人闯入过这个地方。
    e.g. We believe they intruded on to the field of play...
           我们认为他们擅自闯入了球场。