tracker dog

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˈtracker dog noun [countable]  HBAa dog that has been specially trained to follow and find people 追踪犬

ˈtracker dog nounChineseSyllable  

tracker dog
ˈtracker dog noun [countable]
a dog that has been specially trained to follow and find people

tracker dogBrE /ˈtrækə dɒɡ/ 🔊NAmE /ˈtrækər dɔːɡ/ 🔊 nouna dog that has been trained to help the police find people or explosives （受过训练协助搜寻人或炸药的）警犬，搜救犬