手机APP下载

您现在的位置: 首页 > 托福 > 托福听力 > 托福TPO真题听写 > 正文

托福TPO-45 Lecture 2-1

来源:可可英语 编辑:alice   VIP免费外教试听课 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..

Listen to part of a lecture in a biology class.

请听生物课上的部分内容。
So that’s the overview of the human immune system.
所以那就是对人类免疫系统的概观。
But we have a few minutes left. Any questions? George?
不过我们还剩下几分钟时间,有什么问题吗?George?
Yes. You talked about T-cells, naive T-cells. Can you go over that part again?
有,你讲到过T细胞(胸腺依赖型细胞),幼稚型T细胞。你能再过一遍那部分吗?
And also why do we call them that anyway?
还有,我们到底为什么那么叫它们呢?
All right. They’re...they’re known as T-cells because they develop in the thymus.
好的。它们被叫做T细胞是因为它们是在胸腺中发育的。
The what?
什么?
Thymus. That’s T-H-Y-M-U-S.It’s a small organ in the body.
胸腺,拼写是T-H-Y-M-U-S,它是身体中的一个小器官。
Anyway, that’s why we call them that, they come from the thymus, and T-cells are a part of the body’s immune system.
反正这就是我们这么叫它们的原因,它们来自胸腺,而且T细胞是身体免疫系统的一部分。
They can recognize and eliminate cells from outside the body that might cause disease.
它们可以辨认出并消灭来自身体之外可能会带来疾病的细胞。
But why naive? I mean, we might call people naive if they don’t have enough experience to know about the dangers of the world.
但是为什么说它们幼稚呢?我是说,我们会说人幼稚,如果他们没有足够的经验了解世界上的危险的话。
But how can you can a cell naive?
但是你怎么能说一个细胞幼稚呢?
Well...when this type of immune cell encounters a cell from outside the body, like maybe a bacterium,
当这种类型的免疫细胞遇到了来自身体之外的细胞,比如一个细菌,
it interacts with that bacterium and learns to recognize it.
它会和那个细菌互动并学着辨认它。
So whenever the immune cell runs into that kind of bacterium in the future, it’ll attack and kill it.
所以无论将来什么时候这个免疫细胞遇到了那种细菌,它都会攻击并杀掉这种细菌。

重点单词   查看全部解释    
eliminate [i'limineit]

想一想再看

v. 除去,剔除; 忽略

联想记忆
bacterium [bæk'tiəriəm]

想一想再看

n. 细菌

 
recognize ['rekəgnaiz]

想一想再看

vt. 认出,认可,承认,意识到,表示感激

 
immune [i'mju:n]

想一想再看

adj. 免除的,免疫的

 
minutes ['minits]

想一想再看

n. 会议记录,(复数)分钟

 
naive [nɑ'i:v]

想一想再看

adj. 天真的,幼稚的

联想记忆
cell [sel]

想一想再看

n. 细胞,电池,小组,小房间,单人牢房,(蜂房的)巢室

 

    阅读本文的人还阅读了:
  • 托福TPO-45 Lecture 1-3 2016-12-02
  • 托福TPO-45 Lecture 1-4 2016-12-03
  • 托福TPO-45 Lecture 2-2 2016-12-05
  • 托福TPO-45 Lecture 2-3 2016-12-06
  • 托福TPO-45 Lecture 2-4 2016-12-07
  • 新东方托福网络课程:试听更多托福网络课程>>

    关键字: TPO 托福 听写 训练 练习

    发布评论我来说2句

      可可英语官方微信(微信号:ikekenet)

      每天向大家推送短小精悍的英语学习资料.

      添加方式1.扫描上方可可官方微信二维码。
      添加方式2.搜索微信号ikekenet添加即可。