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So, just an introduction to the classes of potential foreign invaders that our immune system tries to defend us against.
所以 我只是简单介绍几类,免疫系统试图抵御的潜在外来侵略者
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couple of streets away that is Edgware, so you know, things like that are really interesting,
过了几条街就是埃奇韦尔，所以，这类事情真的很有趣，
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A couple of you, well this could be-- In fact, some engineering schools offer courses in finance, did you know that?
有几位,好的,事实上,有些工程类院校,也开金融学的课,你们知道吗
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Since we would be traveling to several places on the world, there were several categories that listed the places that were going.
因为我们要去,世界上的几个地方旅行，所以将它们,分成了几类。
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What I want to do in here is just introduce some of the basic kinds of receptors.
我在这里想向你们介绍,几类基本的受体
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The "I'm sure that" pattern can be changed slightly to express several different things.
I'm sure that"句型可以通过稍作变形，来表达几类不同的事情。
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Now, I'm going to be rather quicker in discussing this family of arguments, but let me take at least a couple of minutes and do something about that.
现在,我会加速,讨论这类论证,但起码让我花几分钟,来稍微提一下
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Generally, you think about the immune system protecting against different classes of pathogens and several classes of pathogens are shown on this table.
大体上,你们会认为免疫系统使,我们免受不同种类病原体的侵害,这个表格里介绍了几类病原体
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