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So, not just a spectrum of viruses, but there's viruses and bacteria and parasites and other microorganisms that can cause disease.
所以,不是只有病毒,还有病毒,细菌,寄生虫,和其它各种微生物都能导致疾病
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So you hear about the Omega-3 fatty acids coming from seafood and these tend to be protective against diseases.
你们应该听过海鲜中提取的ω-3脂肪,这种脂肪能抵御多种疾病
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If animals get a similar disease then you can learn about that disease progression in much more detail in the animal.
如果动物也能罹患相似的疾病,那么我们可以通过动物,更详尽的研究病程发展
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We have to ask ourselves, "Which of these does a better job of explaining the facts about disease?"
我们需要问问自己,这两者哪一个能更好地,解释关于疾病的一系列现象
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The fact of the matter is, demon theory doesn't do a very good job of explaining disease, while germ theory does do a good job.
事实上,恶魔理论并不能很好地解释疾病的问题,而微生物理论却能将问题分析得很透彻
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We'll think about it in section, how you don't need to vaccinate everybody, but you just need to vaccinate a critical number in order to stop the disease from progressing through a community.
我们在讨论会上讲这个,为什么不需要给每个人都接种,但你只需要让接种人数达到一个临界值,就能阻止这个疾病在社会中传播
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So these are just some pictures to show you what the smallpox lesions look like on the face of a child, and then distributed over the whole body of an adult, to give you some better idea of what kind of a disease this was.
所以这里给你们展示一些图片,这就是小孩脸上的天花伤痕,这是天花遍布成人全身的样子,它能让你们更好的理解,天花是一种什么样的疾病
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Because if it was a disease that was carried by both humans and squirrels, for example, then in order to get rid of it on the planet, you'd have to vaccinate not only all the people but all the squirrels, right?
因为假如人和松鼠都能携带,某种疾病的话,想要把这种疾病从地球上清除,不仅要给所有人接种疫苗,还要给所有松鼠接种疫苗
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That little J shaped curve is explained primarily by cigarette smoking because that keeps weight down in people, it also makes people sick so that their weight gets low because of that, and it explains the high rates of the disease risk there.
这个小J形曲线主要是由吸烟引起的,因为吸烟一方面能让体重降低,另一方面也引起疾病,疾病让人们的体重下降,这也解释了这里的高患病风险
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