英汉词典

1. 粗略地看;快读;浏览
    When you scan written material, you look through it quickly in order to find important or interesting information.

    e.g. She scanned the advertisement pages of the newspapers...
           她浏览了一下报纸的广告页。
    e.g. I haven't read much into it as yet. I've only just scanned through it.
           我还没有细细研读，只是粗略地翻看了一下。

2. 细看;察看;审视;端详
    When you scan a place or group of people, you look at it carefully, usually because you are looking for something or someone.

    e.g. The officer scanned the room...
           那名警官仔细检查了房间。
    e.g. She was nervous and kept scanning the crowd for Paul...
           她很紧张，眼睛不停地在人群中搜寻保罗。

3. (用机器)扫描(行李等)
    If people scan something such as luggage, they examine it using a machine that can show or find things inside it that cannot be seen from the outside.

    e.g. Their approach is to scan every checked-in bag with a bomb detector.
           他们的方法是用炸弹探测器对每一个办理了登机手续的箱包进行扫描。