Or even, why is it that some people get those runny noses more than others, or why the pain medication that we give to those stubbed toes work in some and not in others?
甚至，为什么有些人比其他人 更容易流鼻涕， 或者那些碰伤脚趾的人使用的止痛药 只在某些人身上管用？