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tracker dog

美 [ˈtrækər dɔːɡ]英 [ˈtrækə dɒɡ]

n.(受过训练协助搜寻人或炸药的)警犬，搜救犬

tracker dog

牛津词典

noun

（受过训练协助搜寻人或炸药的）警犬，搜救犬
a dog that has been trained to help the police find people or explosives

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