Here are three examples of "a dog's life" in the human world.

以下是人类世界中“狗的生活”的三个例子。

youdao

You would say that we'll take the dog to the vet, and end the dog's life.

你会说我们将把狗送到兽医那里，结束它的生命。

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This was a dog's life, he thought.

他想，这简直是狗过的日子。

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The expression, to lead a dog's life, describes a person who has an unhappy existence.

VOA: special.2010.05.30

You would say we'll take the dog to the vet, and end the dog's life.

你会把狗送到兽医那里，然后结束它的生命。

普林斯顿公开课 - 人性课程节选

Later,he wrote a best-selling book, "Marley and Me: Life and Love with the World's Worst Dog."

VOA: special.2009.02.23

But a dog's life might just be an improvement on her own, says Zoe Tay.

CNN: PEOPLE

For such people, at least, it still seems to be a dog's life.

ECONOMIST: The Chinese learn to love animals in a whole new way

Gossip columnist Cindy Adams, shopping her new book, Living a Dog's Life, on NBC's Today Show, gave me a hunch.

NPR: U.S. Obesity Epidemic Hits Pets, Too