Patient: What do you charge for pulling a tooth? Dentist: Fifty dollars. Patient: Fifty dollars for a couple of minutes' work? Dentist: Well, I could do it slower, if you like.

病人：拔一颗牙收费多少？ 牙医：50美元。 病人：只几分钟的活儿就要50美元？ 牙医：好的，如果你喜欢的话，我可以干得慢一些。