英汉词典

1. 加强的;集中的;密集的
    Intensive activity involves concentrating a lot of effort or people on one particular task in order to try to achieve a great deal in a short time.

    e.g. ...several days and nights of intensive negotiations...
           几天几夜紧锣密鼓的谈判
    e.g. Each counsellor undergoes an intensive training programme before beginning work.
           每个辅导员在上岗前都要接受密集培训。