单词	sniffer dog
释义	sniffer dog /ˈsnɪfə dɒɡ / noun A dog trained to find drugs or explosives by smell.Soon, he was asked to train a sniffer dog for the police department.... Only two women permanently work at the premises and it was terrifying when police officers turned up with a sniffer dog to search for drugs. They used a sniffer dog to check for drugs and arrested seven men throughout the operation on Wednesday.
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