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sniffer dog

noun
🔊/ˈsnɪfə dɒɡ/
🔊/ˈsnɪfər dɔːɡ/
 (informal, especially British English)
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  1. a dog that is trained to find drugs or explosives by smell（训练来嗅查毒品或炸药的）嗅探犬Topics Animalsc2