spyhole

英 [ˈspaɪhəʊl] 美 [ˈspaɪhoʊl]

n.  (门上的)观察孔，猫眼儿

复数：spyholes

BNC.49370

牛津词典

noun

  1. （门上的）观察孔，猫眼儿
    a small hole in a door that you can look through to see who is on the other side before opening the door
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    英英释义

    noun

    1. a hole (in a door or an oven etc) through which you can peep

        Synonym:    peepholeeyehole

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