a dog with heavy water-resistant coat that can be trained to retrieve game
retriever详细解释
re.triev.er n.（名词）One that retrieves, especially any one of several breeds of dog that were developed and trained to retrieve game.叼回猎物的猎犬：找到并带回猎物的狗，尤指几种经过培养和训练、用于寻回猎物的狗之一
