释义
n.
a dog trained to attack on command and kept for this purpose
攻击犬。
a person who is very aggressive in their defence or support of someone or something
强力捍卫者（或支持者）
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he was accused of being an all-purpose attack dog for the government. 人们指责他是一条在各种情况下都会为政府效力的御用斗犬。