这就是为什么许多病毒，如麻疹，只会使我们生病一次。
This is why many viruses, such as measles, make us ill only once.
它也试图找出我们对生病怎样反应，为什么这样反应。
It also tries to figure out how and why we respond to sickness.
Ellison说道，“我们的生物学是进化的权衡结果，所以了解这些历史和过程中的冲突可以帮助医学家们理解为什么我们会生病以及我们怎样才能保持健康。”
Our biology is the result of many evolutionary tradeoffs, and understanding these histories and conflicts can really help the physician understand why we get sick and what we might do to stay healthy.
但专家们认为，寒冷的天气并不是导致感冒的原因。那为什么冬季我们更容易生病呢？
But experts believe that there is no link between cold weather and catching colds. So why are we particularly vulnerable this season?
“岛上又没有医生，我们为什么要生病呢？”潘克洛夫一本正经地问道。
"Why should we be ill, since there are no doctors in the island?" asked Pencroft quite seriously.
每个人都不想要生病或死亡，而想要富有和快乐，那么为什么我们却让盗贼夺走我们的宝藏呢？
Each person doesn't want to get sick and die but wants to be wealthy and have happiness, then why do we let the bandit rob us of our treasure?
每个人都不想要生病或死亡，而想要富有和快乐，那么为什么我们却让盗贼夺走我们的宝藏呢？
Each person doesn't want to get sick and die but wants to be wealthy and have happiness, then why do we let the bandit rob us of our treasure?
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