There are times when we would willingly give everything we possess to save our lives, yet we might grudge paying a surgeon a high fee for offering us precisely this service.

• 有时候我们心甘情愿地付出自己的一切财物以保全自己的生命，但是外科医生正是为我们提供这种服务，我们却不肯多给他些医疗费。