1. 轻快的；生气勃勃的
    A brisk activity or action is done quickly and in an energetic way.

    e.g. Taking a brisk walk can often induce a feeling of well-being...
           快步行走常常会使人感到身心舒畅。
    e.g. The horse broke into a brisk trot.
           马突然快步小跑起来。

2. （生意）兴隆的，红火的
    If trade or business is brisk, things are being sold very quickly and a lot of money is being made.

    e.g. Vendors were doing a brisk trade in souvenirs...
           商贩们的纪念品生意很红火。
    e.g. Its sales had been brisk since July.
           自7月以来销售一直很旺。

3. （天气）寒冷而清新的
    If the weather is brisk, it is cold and fresh.

    e.g. ...a typically brisk winter's day on the South Coast...
           南部海岸一个典型的清冷冬日
    e.g. The breeze was cool, brisk and invigorating.
           微风凉爽、清新，令人精神振奋。

4. 爽快干脆的；精干利落的；麻利的
    Someone who is brisk behaves in a busy, confident way which shows that they want to get things done quickly.

    e.g. The Chief summoned me downstairs. He was brisk and businesslike...
           主管叫我到楼下。他做事干练、务实。
    e.g. She is noted for her brisk handling of business.
           她处理事务时的干脆利落是出了名的。