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听力等级

教育学习   

2022-07-03   Video
RNA Folding

Keywords:

When the nucleic acid is relieved of the constraint of being sort of lockstep with another strand in a double helix, it's free to take on all kinds of shapes because it can interact w...

当核酸酸得到缓解的约束有点像与另一股在双螺旋中,免费接受各种形状因为它可以交互与自身的其他部分。 所以结构RNA 可以达到种类繁多,有关订单的更多信息的多肽或protein molecule 可以实现。 这就是允许 RNA生物催化剂,而不是...


2022-06-29   Intermediate
About E. Coli – Part II

Keywords:

Zimmer: Another thing about E. coli is that to understand what it means for it to be alive is to understand how it's alive with other E. coli. For a long time, scientists just thought about E. coli ju...

Zimmer:关于大肠杆菌的另一件事是,要了解它活着意味着什么,就要了解它是如何与其他大肠杆菌一起活着的。 很长一段时间,科学家们只是把大肠杆菌看作是一个小小的化工厂。 你只需喂它,它就会生长和复制,然后它就会生长和复制,然后你看看它用来做...


2022-06-29   Video
Creating Embryonic Stem Cell Lines

Keywords:

The inner cell mass cells, which are going to be removed and grown in a Petri dish. We first remove the outer layer that would normally form the placenta. Here the cells are put into a...

内部细胞团 /哪些将被删除并在培养皿中生长。 我们首先去掉外部的层,该层通常会形成胎盘。 以下是单元格放入培养皿中。 通常有鼠标初期玻璃纤维在 it 的底部设置为帮助细胞生长。 他们中的大多数没有幸存下来,但少数do 并且可以长成菌落的单元...


2022-06-27   Intermediate
About E. Coli – Part Ⅰ

Keywords:

Steve: E. coli is obviously fascinating we have, what did you say, we have about a billion of them in our bodies at any one time? But what the zest [possessed] you would [to] actually spend, however m...

Steve:大肠杆菌显然很迷人,你说什么,我们体内任何时候都有大约 10 亿个大肠杆菌?但是,无论你花了多少年时间,在大肠杆菌上写出多少字,你实际上会花多少热情呢?Zimmer:嗯,我记得有人带着一些担忧问我这个问题,答案很简单。 我一直对...


2022-06-25   Video
Differentiation and the Fate of Cells

Keywords:

Here we're going to go through quickly the early stages of development again. And then we're going to get to this stage when the germ layers are set aside. The three germ layers, the ...

我们来了要通过快速进入早期阶段的再次发展。 然后我们就要走了进入此阶段当胚芽分层时被搁置一旁。 三个胚层,外胚层、中胚层、和内胚层。 所以在这里你会看到内部细胞团产生对整个成年动物,在本例中,是人类。 相同的过程将发生在鼠标中我们稍后会看到...


2022-06-24   British English
Electronic Education

Keywords:

Electronic education. Flipping the classroom. Hopes that the internet can improve teaching may at last be bearing fruit. THE 12-year-olds filing into Courtney Cadwell’s classroom at Egan Junior H...

电子教学跃然于教室间但愿互联网可以改善教学的希望终能修成正果Egan初中坐落于硅谷郊外郁郁葱葱的洛斯拉图斯,那里12岁的孩子们选了考特尼·卡德威尔老师的课程,他们每个人都从手推车里拿一部白色笔记本电脑,然后登陆到网站去做数学题。 卡德威尔老...


2022-06-21   Intermediate
Searching for Intelligence

Keywords:

Steve: What, really, is intelligence? Zimmer: Well there are a lot of different ways of testing intelligence, and you can find them on IQ tests and other kinds of tests; and they tend to correlate to...

Steve:智能到底是什么?Zimmer:嗯,有很多不同的方法来测试智力,你可以在智商测试和其他类型的测试中找到它们;它们往往相互关联,因此在一项智力测试中得分相同的人在另一项测试中也会进行类似的测试,因此这些分数在某种程度上是联系在一起的...


2022-06-21   Video
Zebrafish Heart Regeneration

Keywords:

Zebrafish, which any of you who are fish fanciers keep in the fish tank, can get to be about two inches long. It's got a little heart with just two chambers one atrium and one ventricle an...

斑马鱼,你们中的任何一个养鱼的人是谁在鱼缸里,可以得到大约两英寸长。 它有一颗小小的心只有两个腔室,一个中庭和一个心室和那个泵血液遍布全身鳃等效的鱼的肺。 心脏肌肉发达就像我们的心一样,里面有非常厚厚的肌肉壁允许 Heart在整个过程中有效...


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