The well-trained dog rushed like an arrow, running very fast and full of confidence.

这只训练有素的狗像箭一样飞奔出去，跑得非常快，充满信心。

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A well-trained dog is more confident and can more safely be allowed a greater amount of freedom than an untrained one.

一只训练有素的狗更自信，给它更多的自由时间会比未经训练的狗更安全。

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A trained dog can act as a guide to a blind person.

经过训练的狗能担任盲人的向导。

《新英汉大辞典》

John Grogan wrote that he briefly considered the possibility that his dog could be trained to be a show champion.

VOA: special.2009.02.23

"But then it became so affecting and really important as far as recognizing a wounded veteran like Bill Campbell and the dog that really has saved him and the inmate that trained the dog.

VOA: standard.2010.05.18

Glenn Close says when she learned that Sgt.Bill Campbell - the first veteran to receive a Dog Tag dog - was returning to the prison to meet the inmate who trained Pax, she had to capture that moment.

VOA: standard.2010.05.18

So doctors gave him a specially trained dog that can sense when an attack was coming on.

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Fido is the first sensor that can detect TNT and other explosives with the same success as a trained dog.

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"A well-trained dog and a very good, well-trained handler can find explosives with little or no false alarms, " Beltz said.

CNN: Are dogs the key to bomb detection at airports?