One time,after World War Two ended, he brought his radio show to soldiers waiting at a base in California to return to civilian life.
VOA: special.2009.03.09
It's on the gene for hemoglobin and the hemoglobin that you produce if you have sickle cell anemia is not quite right because there's one base difference.
这个缺陷基因和血红蛋白有关,如果你有镰状红细胞贫血症,那你所产生的血红蛋白就不太正常,因为这里有一个碱基不同
Well one way you could do it is by saying 'if I have this one base pair difference then this sequence is going to be cut by a specific restriction enzyme that recognizes the sequence CTGAGGA'.
一种方法是通过考虑,"如果我有这个不同的碱基对,那该序列必然会,被特定的限制酶识别并切割,这个特定的限制酶能识别,CTGAGGA "
Listeners on Earth heard the countdown from Tranquility Base: "Three,two,one .
VOA: special.2009.07.15
One thing that does matter to our base level of wellbeing which is external circumstance is democracy versus oppression.
对基础幸福水平很重要的一样东西,它是一个外在因素,那就是民主和压迫。
closing an air field in a populated area and building a new one on an existing U.S.base in the northern part of the island.
VOA: standard.2009.10.20
Well let's see. My fall back is, I could just do linear search, walk down the list one at a time, just comparing those things. OK. So that's sort of my base. But what if I wanted, you know, how do I want to get to that sorted list? All right?
我只能做线性搜索了,一次遍历一遍列表,一个一个比较,但如果我想要,那怎样得到有序的列表呢?,现在的一个问题是,我们排序之前?
One of the things about these plasmids that makes them very useful is that their entire base pair sequences is known.
质粒之所以有用,其中一个原因就是,它的全部碱基序列都是已知的
I just give you one of those, right, because you could write down the other one because you know the other complimentary sequence from base pairing?
我只写了一条链的序列,因为你们能够写出另一条,因为你们根据碱基配对,就能推测出互补链的序列
Notice if I'm going to have two different sub problems I need to have two base cases here to catch this. And if I only had one it would error out. And as a consequence, I can go off and ask about rabbits. Let's see.
我需要定义两个基础事件来处理它,如果我只有一个基础事件的话就会产生错误,这样我就能够知道到底有多少只兔子了,让我们来看看,在第12个月末,没那么简单,在第二年末兔子就很多了。
I'm going to go there initially, so I can move this over here, so I can get the base part of that over there, I want to put that one there before I put this over here, finally I get to the point where I can move the bottom one over now I've got to be really careful to make sure that I don't cover up the bottom one in the wrong way before I get to the stage where I wish they were posts and there you go.
我要先把其他的放到多余的柱子上,然后把最底下的放到目标柱子上,我要在把除了最底下的圆盘,其他的圆盘挪过来之前,把最下面的圆盘放在这儿,因此我得出了最下面的盘子,应该如何摆放的结论,当我没得到其他盘子的正确摆放位置的时候,要很小心的确认没把错误的盘子,放在最下面的盘子上面。
People in serious accidents with their paralysis as the result of the accident, very often, usually-- again, this is all the average-- go back to their base level of happiness: if they are happy before, they will be happy one year after; if they are unhappy, they will remain unhappy.
遇到严重意外的人,意外导致瘫痪,经常地,一般性的…,再次强调,这是平均而言-,都会恢复到基础幸福水平:,他们以前是快乐的,一年后,他们也会快乐;,如果不快乐,将维持不快乐。
There's the base case. If it's longer than one, what do I want to do? Well I'd like to check the two end points to see are they the same character? And if they are, then oh, I just need to know is everything else in the middle a palindrome?
如果只有一个元素也是回文,这是基本事件,如果比一个长的话那么我应该怎么做?,我将会查看两头是否相同?,如果是的,我只要知道中间剩下的部分是不是回文即可?
They face in the opposite direction and you could predict the properties of one from base pairing rules of the other but they're not the same.
它们是反向的,尽管你能够通过一条链上的碱基序列,预测另一条链的序列,但这两条链是不同的
The 5' carbon has a phosphate off of it and that phosphate is linked to the 3' carbon of the next one and they all have a base hanging off the side.
'碳的磷酸基,连接到下一个戊糖的3'碳部位,它们都有连接在一侧的碱基
If I'm talking about two DNA strands and they differ only in one or two base pairs they won't be exact complements and they won't form this double helix.
假设有两条DNA单链,有一两个碱基不能配对,它们就不能完全互补,也无法形成双螺旋形结构
Now DNA is a double helix and I've only shown you one part of the helix, right? I've shown you one upright strut and a base hanging off of it, but it forms a double helix because complementary strands of DNA strongly associate with one another and that's a very stable structure.
NA是双螺旋,我只是给你们讲了螺旋的一边,我给你们演示,一条链的支柱及碱基团,但其能构成双螺旋,是因为DNA是完全互补的两条链,彼此之间结合紧密,结构异常稳定
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