A happy dog wags his tail in its natural, mid-level position - and his ears, mouth, and body will look relaxed, too.

高兴的狗狗摇尾巴动作自然，中速，而且他的耳朵，嘴巴，身体都显得很放松。

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Very happy dog eggs, forget the arms of the mirror, just jump, called it … mirror fell off, the dog picked up the egg from the ground up.

狗蛋快乐极了，忘记了怀中的镜子，仅仅跳啊，叫呀……镜子掉了下来，狗蛋从地上拾了起来。

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Will insists that it isn't cruel, because Otis is a really happy dog. He remains so relaxed that he often falls asleep on the plane ride up.

威尔坚持认为这样做并非残忍，因为奥蒂斯真的很快乐。他非常放松，在坐飞机升空时，甚至常常睡着。

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"That doesn't mean the dog is happy, that means the dog is excited!"

CNN: 'Dog Whisperer' Cesar Millan on adopting the right dog

When a dog devotes so much of herself to your happiness, it only stands to reason you would want to make that dog happy in return.

NPR: 'Dog is My Co-Pilot'

Grant is happy to have her dog back, but wants United to punish the person responsible.

CNN: STORY HIGHLIGHTS