除非是用作种犬，所有的母犬都应摘除卵巢。All bitches should be spayed unless being used for breeding.他因没能给比特犬戴嘴套而被判有罪。He was convicted of failing to muzzle a pit bull.可以训练嗅探犬追捕他们。Sniffer dogs could be trained to track them down....

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“犬”的拼音为：quǎn...