He undertook to teach the dog better manners, punishing him if he barked before some stranger actually started to fiddle with the front door.
他于是着手训练狗变得更文明一些，如果它在陌生人动前门前吠叫将受到惩罚。
He undertook to teach the dog better manners, punishing him if he barked before some stranger actually started to fiddle with the front door.
他于是着手训练狗变得更文明一些，如果它在陌生人动前门前吠叫将受到惩罚。
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