如果你生病了怎么办？
Otherwise, if you are weak and often fall sick physically or mentally, no matter how much money you give your parents, they will not feel truly happy.
否则如果你身体羸弱，或者终日意志消沉，哪怕你给父母再多钱，他们也不会得到真正的快乐。
In fact, they seldom fall sick now.
其实，他们现在也很少生病了。
Environmental pollution makes many people fall sick.
环境污染使许多人生病。
Those who fall sick easily should take extra precaution.
至于平常就较容易生病的人，就要更多加小心一些。
Medicine is the study of human healths and treatment of diseases. We can understand body functions, what causes us to fall sick and how to treat diseases.
医学是对人类健康和疾病治疗的研究。我们可以了解人体功能，生病的原因以及怎样治疗疾病。
Medicine is the study of human healths and treatment of diseases. We can understand body functions, what causes us to fall sick and how to treat diseases.
医学是对人类健康和疾病治疗的研究。我们可以了解人体功能，生病的原因以及怎样治疗疾病。
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