To study a disease, scientists like to look at cells from the diseased organ. But those cells aren't usually very easy for scientists to get their hands on.

科学家们喜欢通过直接观察病变器官的细胞来研究疾病。然而，通常情况下，科学家们并不能轻易接触到这些细胞。

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If you notice it’s becoming increasingly difficult to finish tasks that were once easy, talk to your doctor about heart disease.

假如你发现曾经很容易完成的任务越来越难做，向医生说明，检查是否患有心脏病。

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The disease is fairly easy to halt with simple rehydration fluids.

凭借简单的补水补液，治疗霍乱相当容易。

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It was easy to tell if somebody had an infectious disease but you might not have known that they had cancer at that time and they just died.

如果有人患有感染性疾病,那很容易判断,但在那个时候医生可能不知道,病人得的就是癌症,病人就这么死去了

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Mushrooms are an easy-to-spot sign of disease that may indicate root rot and a potentially unstable tree.

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But finding reliable monogenic links to disease is the easy part.

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Note that autoimmune disease is also very easy to observe in cats and dogs.

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