work like a dog不要简单地理解为“像狗一样工作”，实际意思是“努力、卖命地工作”。

【例句】
Tom gets a promotion which is because he always works like a dog.
Tom升职了，因为他总是拼命地工作。

They say that to be successful, a person has to work like a dog.
他们说，一个人想要成功就得拼命工作。