guide dog       
noun [ C ] uk/ˈɡaɪd ˌdɒɡ/ us/ˈɡaɪd ˌdɑːɡ/
 (盲人的)领路狗,导盲犬
a dog that has been specially trained to help a blind person travel around safely
  guide dogs for the blind 导盲犬 
 
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