tracker dog
noun /ˈtrækə dɒɡ/
/ˈtrækər dɔːɡ/
- a 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 - Police searched the area with a helicopter and tracker dogs.
警方用直升机和警犬搜查了该地区。
- Police searched the area with a helicopter and tracker dogs.