The mastiff was generally used as a guard dog and is widely recognized as a particularly intelligent species.

藏獒犬一般用来看家护院，也是很聪明的犬种。

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The dog and the cat, the most favored of pets, are beautiful, intelligent animals.

狗和猫——人们最喜爱的宠物，是漂亮和聪明的动物。

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He looked at the dog and said "I realize that you are a very intelligent dog and have some interesting abilities."

他看着狗说：“我知道你是条非常有才的狗，也有一定的能力。”

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Hilda in her red down jacket came out with the dog as she parked: it was a short-haired terrier, alert and intelligent, white with a brown patch over one eye.

NEWYORKER: She��s the One