不及物动词

1. (在大量相似物中)搜索，搜寻
    If you trawl through a large number of similar things, you search through them looking for something that you want or something that is suitable for a particular purpose.

2. 用拖网捕(鱼)
    When fishermen trawl for fish, they pull a wide net behind their ship in order to catch fish.

1. a conical fishnet dragged through the water at great depths

    Synonym: dragnettrawl net

2. a long fishing line with many shorter lines and hooks attached to it (usually suspended between buoys)

    Synonym: trawl linespillersetlinetrotline