1. 使（房间或建筑）通风;使空气流通
    If you ventilate a room or building, you allow fresh air to get into it.

ventilate的意思

    e.g. Ventilate the room properly when paint stripping...
           当油漆开始剥落时，要给房间适当通风。
    e.g. The pit is ventilated by a steel fan.
           矿井中用钢制通风机来保持空气流通。

2. 发表（看法）；表达（感情）
    If you ventilate your ideas or feelings, you talk about them or express them freely in front of other people.

    e.g. He did not think it the job of officials to ventilate their doubts or daydreams.
           他认为公开提出自己的疑问或不切实际的想法并非官员们的分内之事。