1. (使)回旋;(使)旋转
    If something or someone whirls around or if you whirl them around, they move around or turn around very quickly.

    e.g. Not receiving an answer, she whirled round...
           没有得到答案，她飞快地转过身去。
    e.g. He was whirling Anne around the floor...
           他正拉着安妮在舞池内转圈儿。

2. 一连串;接连不断的活动
    You can refer to a lot of intense activity as a whirl of activity.

    e.g. In half an hour's whirl of activity she does it all...
           经过半个小时的忙碌，她全都做完了。
    e.g. Your life is such a social whirl.
           你总是在不停地参加社交活动。

3. 混乱;躁动
    If a person or their mind is in a whirl, they are very confused or excited.

    e.g. My thoughts are in a whirl.
           我的脑子里一团乱。

4. 试一试;尝试一下
    If you decide to give an activity a whirl, you do it even though it is something that you have never tried before.

    e.g. Why not give acupuncture a whirl?...
           为什么不试试针灸？
    e.g. We decided to give it a whirl.
           我们决定尝试一下。