They say that to be successful, a person has to work like a dog.

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

So in those circumstances, I'm an advocate of active euthanasia. I think it is just as if you have a dog who was dying from some disease, you wouldn't say, well we just let nature take its call.

所以这种情况下，我通常会,支持安乐死，我认为,这就像是你的狗得了病,马上就要死了，你不会说，嗯，我们顺其自然吧。

普林斯顿公开课 - 人性课程节选

Yet,some people say that you can never teach an old dog new tricks.

VOA: special.2010.05.30

So, the claim about a phobia is that there's a bad association between, say dog and fear, or between airplanes or snakes and some bad response.

比如说，恐惧症就是在狗和恐惧之间,或是在飞机，蛇和一些糟糕反应之间，存在着消极的联结。

耶鲁公开课 - 心理学导论课程节选

Some people say we live in a dog-eat-dog world.

VOA: special.2010.05.30

You give the dog a treat and say, "Good dog."

你给狗狗奖励，并且说“好狗狗“

耶鲁公开课 - 心理学导论课程节选

Still,people say every dog has its day.

VOA: special.2010.05.30

If you have a dog and you say "Good dog" to reward the dog, by your logic, which is right, at some point you might as well give the dog a treat along with the "Good dog."

如果你有只狗,你用“好狗狗“这话来奖励它，根据你正确的逻辑，总有时候你会在说“好狗狗“的同时,给它些奖励“

耶鲁公开课 - 心理学导论课程节选